61results about How to "No processing required" patented technology

The invention discloses a method for recovering and preparing lithium iron phosphate from waste lithium iron phosphate batteries. The method comprises: 1) dismantling the recovered waste lithium iron phosphate batteries, stripping battery cases, immersing the batteries, separating the electrode plates from the powder material of positive and negative terminals through a method of alternation of ultrasonic and mechanical stirring, taking out the electrode plates and diaphragms, and obtaining mixed liquor; 2) performing a preliminary ball milling to the mixed liquor, and drying the uniformly mixed slurry obtained by the preliminary ball milling; 3) calcining the dried material in oxidizing atmosphere to obtain a recovered material, adding iron source, phosphorous source and optionally new lithium iron phosphate, then adding carbon source, high energy ball milling the obtained material, drying the material to obtain a pre-burning material of the recovered material; 4) microwave sintering or solid state sintering the pre-burning material of the recovered material in protective atmosphere to obtain the product of lithium iron phosphate. The preparation method has the advantages of environmental protection, no pollution, simpleness and practicality, high production utilization rate, simple

The invention discloses a water-soluble total-synthesis metal working fluid and application thereof. The working fluid is prepared from the following raw materials in percentage by weight: 1wt%-30wt% of a lubricant, 1wt%-40wt% of a corrosion inhibitor, 1wt%-40wt% of organic amine, 1wt%-20wt% of a cleaning agent, 1wt%-20wt% of a coupling agent, 0.5wt%-5wt% of an antifoaming agent and the balance of water. The working fluid can form water-based steam with anti-rust property in an induction manner in the use procedure, so that the problem of rusting caused by steam which is easily generated by a closed machine tool is solved, and therefore, the working fluid is suitable for a high-precision machine tool, especially a numerical control machine tool with a closed structure.

The invention relates to a heating power system bearing load cleaning method. The feature is adding agent that has cleaning and maintaining function into agent melding trunk and diluted by desalination water. The compounding of the agent is: interface active agent 5-20%, penetrating agent 5-8%, removing agent 5-15%, dispersing agent 5-20%, surface passivator 5-10%, and the other is water. Adding the agent into system while the boiler or the steam turbine is running, the pH value is maintained between 6 and 10 while cleaning.

The invention relates to the technical field of anticorrosive coating materials, in particular to a phosphorus-magnesium-based cement concrete coating protective material as well as a preparation method and the application thereof. The phosphorus-magnesium-based cement concrete coating protective material provided in the invention is prepared from the following raw materials in parts by weight, 55-90 parts of magnetite, 25-50 parts of a salt-resistant compacting agent, 20-35 parts of a mineral admixture, 0.5-2 parts of a high-efficiency water reducing agent, 5-15 parts of a composite retarder,10-25 parts of ground phosphate, 45-100 parts of quartz sand, 1-4 parts of fibers, 0.5-3 parts of a water-resistant agent and 2-5 parts of an alkaline pH stabilizer. The invention further provides apreparation method and application of the phosphorus-magnesium-based cement concrete coating protective material. The obtained phosphorus-magnesium-based cement concrete coating protective material has the advantages of being high in chloride ion permeability resistance, good in water resistance, good in gas resistance, high in durability, high in adhesive force with a base material, good in crackfollowing performance, resistant to corrosion, salt mist, alkali and aging, low in cost, environmentally friendly, simple in process and the like, and has good practical application value.

The invention relates to a preparation method of a canned clean water young lotus root, comprising the following steps: washing clean a young lotus root, removing the head and tail parts of the lotus root, placing in an environment of 1-8 DEG C, cutting the young lotus root into segments, mixing with young lotus root soup, then filling, sealing, and sterilizing by microwaves for 3-15 minutes, wherein the soup is a mixed liquor of citric acid, lactic acid, sucrose, calcium chloride, vitamin C and water. The soup of the invention is not added with any substance harmful to human bodies, thus having high safety; the young lotus root soup and the microwave cold sterilization technology are adopted, thereby overcoming the defect that the young lotus root are softened in the traditional thermal sterilization technology, maintaining the specific brittleness and color of the young lotus root up to the hilt and greatly prolonging the storage period of the canned young lotus root; and vitamin C is added, thus being favor of human health. The canned young lotus root prepared by the invention has good taste, fine color, favorable brittleness, rich nutriments, easy carrying and storage, long storage period and edible convenience, is favor of being digested, absorbed and utilized by human bodies and can be eaten after being opened without processing within the storage period.

The invention relates to a method for preparing a porphyra yezoensis R-phycoerythrin fluorescence probe, which is characterized in that the method carries out the following steps at the temperature of 20 DEG C: firstly, deriving R-phycoerythrin in a mole ratio of 40 to 1 of 3 - (2 - pyridine 2-mercapto) propionic acid n-hydroxysuccinimide ester and R-phycoerythrin, 2 hours shaker dark slow-speed oscillating for 2 hours, and using Sephadex G-25 desalting columns to collect the derived R-phycoerythrin; then carrying out the sulfhydrylation of an antibody in a mole ratio of 500 to 1 of dithiothreitol and the antibody, shaker slow-speed oscillating for 1 hour, and using the Sephadex G-25 desalting columns to collect the sulfhydrylation antibody; finally, taking the derived R-phycoerythrin according to the ratio of the mass ratio of 3 to 5 of the R-phycoerythrin before derivation and the antibody to mix with the sulfhydrylation antibody, shaker slow-speed oscillating for 12 hours, adding 100muml N-ethyl maleimide for reacting for 30 minutes, separating and purifying by a Sephacryl S-300HR chromatographic column, and using an eluant of 50mmol / L phosphate buffer and 150 mmol / L sodium chloride with a pH value of 7.0 to collect a separated cross-linked product, namely a porphyra yezoensis R-phycoerythrin fluorescence probe.

The invention provides a device and method for forming a gear through rotary swaging in the radial direction, and relates to a gear forming device and method to solve the problems that when axial overall loading is adopted for a traditional gear obtained through finish forging, forming accuracy is low, and required loads are large. According to the device, a plurality of arc-shaped grooves in a rotary swaging die 1 and a plurality of protrusions in the rotary swaging die 1 are alternately arranged, radial punch pins with springs arranged at the bottom in a sleeved mode are placed in stepped holes respectively, and the radial punch pins and components of a guide die are arranged in the rotary swaging die. The method includes the steps that firstly, a blank to be machined is arranged on a mandrel in a sleeved mode; secondly, the rotary swaging die rotates by 1 / 2N circles in the clockwise direction or the anti-clockwise direction; thirdly, in the rotating process, the protrusions exert pressure on an arc-shaped head, and the radial punch pins move gradually towards the axis of the mandrel along the stepped holes; fourthly, when the rotary swaging die rotates to the centers of the protrusions and coincides with the axes of the punch pins, the forming process is completed; fifthly, the rotary swaging die continues to rotate by 1 / 2N circles in the clockwise direction or the anti-clockwise direction, the radial punch pins retreat to the initial positions, and then the forged gear part can be taken out. The device and method are used for forming the gear.

The invention provides special flavor lotus sprout can which is composed of the following raw materials of, by weight, 55-70% of lotus sprouts, 1-3% of seasoning materials, and the balance being a soup, wherein the seasoning materials is composed of ginger, red chilli, green pepper, fennel fruits, bay leaves, garlic and radix angelicae; and the soup is prepared by blending acetic acid, a sweetening agent, salt and water. The lotus sprout can retains specific crispness and color of the lotus sprouts, tastes sour and delicious, has bright soup juice and rich nutrition, facilitates digestion, absorption and utilization for human body, is convenient for carrying and storing, and has very good popularization and application value.

The invention relates to an ultra-light heat-insulation scouring-resistant functional integrated composite material and a preparation method thereof, and belongs to the technical field of light special material development. The composite material comprises a high-temperature-resistant and anti-scouring ceramic composite material layer, a bonding layer and a high-temperature wave-absorbing and heat-insulating layer, the bonding layer is positioned between the high-temperature-resistant and anti-scouring ceramic composite material layer and the high-temperature wave-absorbing and heat-insulating layer, and is in direct contact with the two; and the bonding layer is formed by mixing a polysilazane precursor, titanium alloy powder, silicon carbide powder and a dispersing agent according to a specific proportion. The integrated composite material provided by the invention has the functions of high temperature resistance, high Mach number scouring resistance, ultra-light weight, high porosity, high-temperature wave absorption and heat insulation, and can meet the multifunctional integrated requirements of the aerospace field on high temperature resistance, heat insulation, high-temperature wave absorption, light weight and the like. The method is reasonable in step design, simple and controllable in process and convenient for large-scale industrial application.

The invention discloses a method for preparing a calcium silicate board from ceramic polishing waste, which comprises the following steps of: uniformly mixing raw materials such as the ceramic polishing waste, diatomite, quick lime and the like according to a proportion, performing vacuum pressure filtration forming, and synthesizing a calcium silicate board product under the high-temperature high-pressure hydrothermal condition, wherein steam distillation is performed at the constant temperature of between 165 and 200 DEG C for 10 to 24 hours, and steam pressure is 0.6 to 1.2MPa. A large amount of ceramic polishing waste is recycled. The calcium silicate board product prepared by the method has the advantages of saving soil and energy, protecting environment, utilizing the waste and the like, and has obvious economic benefit and social benefit.

This invention relates to a spigot and faucet pipe connector applying metal ring for lock, rubber liner sealing and screw bolt to lock at the side which can adjust freely it terms of the assembly conditions round the pipe center by 360 deg. with very compact structure, conveneint for maintenance and operation.

The invention relates to a method for scrubbing to remove residues from a dishwasher. Two pulverizing members are arranged in a residue removing part of the dishwasher, the two pulverizing members have opposite surfaces, and a gap is formed between the two opposite surfaces; the two opposite surfaces rotate relative to each other, and the axes of rotation are intersected with or are perpendicularto the plane on which the two opposite surfaces are located; when residue removal is conducted on waste residues in the dishwasher, the flowing water is introduced into the gap between the two opposite surfaces, and in the relative rotation, the two opposite surfaces conduct scrubbing and rolling on the waste residues which flow in with the water. Through the relative rotation of the two oppositesurfaces, the waste residues are subjected to scrubbing and rolling; the intensity of scrubbing and rolling on the waste residues is large, especially compared with instantaneous contact and instantaneous detachment treatment manners such as impacting, cutting and the like on the waste residues, the scrubbing and rolling action has strong sustainability on the waste residues, and the treatment effect is better; compared with a conventional method of random impact and random touch cutting between waste residues and cutters, the treatment speed is greatly accelerated.

The invention belongs to the technical field of radioactive waste treatment, and relates to an efficient adsorption treatment method for a radioactive waste resin Fenton oxidation waste liquid. The method comprises: (1) filtering a radioactive waste resin Fenton oxidation waste liquid to remove the residue and the insoluble matter, and adsorbing with a molecular sieve; and (2) measuring the nuclide radioactivity concentration of the waste liquid adsorbed by the molecular sieve, directly discharging the waste liquid if the measured value is lower than a set value, and making the waste liquid return to the molecular sieve and be adsorbed if the measured value is higher than or equal to the set value. According to the present invention, with the method, the deep purification treatment of thekey feature nuclides Co-60, Cs-137 and Sr-90 can be achieved while the characteristics of the original waste liquid are substantially unchanged, and the treated waste liquid can meet the direct discharge requirement (the total nuclide radioactivity concentration is less than 500 Bq / L).

The invention provides an inorganic binding material for assembled prefabricated parts, and a preparation method and an application thereof. The inorganic binding material is prepared from a componentA and a component B, wherein the component A comprises, by weight, 50-100 parts of a magnesium compound, 15-35 parts of fly ash, 0.5-1.5 parts of a superplasticizer and 6-12 parts of a composite retarder; and the component B comprises, by weight, 15-30 parts of phosphate, 50-120 parts of quartz sands, 0.5-5 parts of fibers, 1-3 parts of a waterproofing agent and 3-6 parts of a pH stabilizer. Theinorganic binding material for assembled prefabricated parts has the advantages of adjustable solidification time, high bonding strength, high tensile strength, good bonding durability, low shrinkage,good weather resistance, good high temperature resistance, low cost and environmental friendliness.

The invention provides a preparation method of a composite board. The preparation method comprises the following steps: S1. coating hot melt adhesives on the upper and / or lower surface of a polystyrene substrate and putting the polystyrene substrate into a hot roller press to be hot-pressed to form a pre-pressed substrate; S2. coating metal foils on the upper and / or lower surface of the pre-pressed substrate to form a pre-pressed composite board; and S3. putting the pre-pressed composite board into the hot roller press to be hot-pressed to form the composite board, wherein the hot-press temperature is 121-280 DEG C. The preparation method has the beneficial effects that the processing method for coating the metal foils (such as copper foils) on the polystyrene substrate by using the hot-pressing mode of the hot roller press in two steps cannot cause wrinkling of the metal foils due to too fast cooling and the metamaterial composite board with smooth surface is obtained; and the processing method is conductive to simplifying the production process and reducing the cost and is pollution-free and the metal foil coating bonding force meets the processing requirement of a metamaterial, so the metamaterial composite board can be widely applied in the field of the metamaterial processing.

The invention relates to a tool for the epoxy resin casting of a motor. The tool comprises a support base and a central column, wherein the cylindrical central column is vertically arranged at the central position of the upper end face of the support base; a screw penetrates through the center of the support base from bottom to top, and is connected with the lower end of the central column; the lower end face of the central column is clung to the upper end face of the support base; the outer side of the central column is sleeved with a motor stator; a sealing ring is embedded into the outer lateral surface of the upper end of the support base, and is attached to the inner side of a jacket of the motor stator. The tool is simple in structure; due to the adoption of a split structure, the tool is convenient to assemble and disassemble; procedures for machining an inner hole of the motor stator are reduced, so that the production efficiency is improved.

The invention provides a sewage treatment method. Water body pollutants are subjected to adsorption treatment through porous composite materials; the porous composite material comprises a magnetic inner core (1) and a porous case (2) coating the outside of the inner core; a microfluid technology is used for synthesizing micron order porous composite materials; the water body pollutants are subjected to adsorption treatment by the porous composite materials.

The invention provides an automobile instrument pointer dial quick reading method based on a single-chip microcomputer, comprising the following steps: (1) establishing a standard image of an instrument pointer dial; (2) shooting a to-be-detected instrument pointer dial; (3) setting a reference line with a center point O as the center, setting the radius R of an arc where the reference line is located, calibrating a point A1 on the reference line, calculating the slope of the connection line of the point A1 and the center point O if the instrument pointer in an initial state overlaps with the connection line of the point A1 and the center point O, setting the coordinate of the point A1 as (x, y), extracting the gray value Y1 of the coordinate (x, y) of A1, adjusting the instrument to make the pointer deflect to a certain degree; (4) making an offline lookup table; (5) querying the position to which the pointer deflects; (6) calculating the relative deflection angle Beta of the pointer relative to the initial position; and (7) calculating the automobile speed based on the relative deflection angle Beta. The method has the advantage that the method can be implemented only using a single-chip microcomputer, and does not need a lot of image processing and data calculation.

The invention discloses a novel method for using magnesium oxide, belonging to the technical field of energy. The novel method comprises the following steps: by adopting wuyunjing No.7 rice husk as an experiment raw material, performing pyrolysis experiment by using a differential thermal balance at the heating velocities of 5 DEG C / minute, 10 DEG C / minute, 15 DEG C / minute and 20 DEG C / minute respectively, confirming mechanism function by using a Malek method, and calculating the activation energy by using a Coats-Redfern method, wherein the activation energy is 84.24kJ / mol. A proper amount of magnesium oxide powder is doped into the rice husk, the experiment is made by using same pyrolysis conditions and analysis methods, and the pyrolysis activation energy is 75.39KJ / mol after magnesium oxide is used for catalyzing. The result of experiment shows that due to catalysis of magnesium oxide, the pyrolysis activation energy of the rice husk is reduced by about 10.4%, so that sufficient pyrolysis is achieved.

The present invention is applicable to the technical field of inkjet printing equipment, and discloses a conveying platform device of an inkjet printing machine, which is used to be installed on the frame of the inkjet printing The ink printing unit is arranged oppositely, and the conveying platform device includes an assembly frame, a conveyor belt backing plate of equal thickness laid flat on the assembly frame, driving rollers and driven rollers respectively installed at both ends of the assembly frame, and a set The conveyor belt laid between the driving roller and the driven roller and on the conveyor belt backing plate, the assembly frame includes a frame and a plurality of conveyor belts laid side by side on the frame along the moving direction of the conveyor belt backing plate. In the present invention, the assembly frame is arranged to include a frame and a plurality of backing plates laid side by side on the frame along the moving direction of the conveyor belt, and the backing plates of the conveyor belt are flat plates of equal thickness, thereby ensuring the flatness of the supporting plane of the conveyor belt, Make the conveying device precise and stable when conveying the medium, so as to achieve better inkjet printing effect.

The invention provides a rapid virus detection method based on a single-molecule total internal reflection fluorescence imaging technology. The method comprises the following steps: step A, adding a fluorescent nucleic acid probe into a virus standard solution as a to-be-detected solution; step B, putting the to-be-detected solution on a total internal reflection fluorescence imaging device for fluorescence signal detection, calculating a diffusion coefficient according to the dynamic change of a tracked fluorescence signal phase point, taking the diffusion coefficient as a single molecular dynamics fingerprint signal of virus particles, and calculating the average hydrodynamic diameter of the virus by utilizing a Stocks-Einstein equation; and step C, replacing the virus standard substancewith a to-be-detected virus sample, obtaining a monomolecular kinetic fingerprint signal and a hydrodynamic diameter of the to-be-detected virus according to the same operation, and indicating that the to-be-detected virus sample contains the same type of virus if the monomolecular kinetic fingerprint signal and the hydrodynamic diameter conform to the monomolecular kinetic fingerprint signal andthe average hydrodynamic diameter. Quantitative detection can be realized by counting the two-dimensional paths of the fluorescence point signals conforming to the diffusion coefficient. The method has the advantages of simplicity, rapidness, high efficiency and economy, and is suitable for large-scale rapid detection of viruses.

The invention discloses a soft damage resistance testing method. The soft damage resistance testing method comprises: testing the initial luster of a to-be-tested area of a to-be-tested piece; putting the to-be-tested piece on a sample base plate, and fixing the to-be-tested piece; driving the sample base plate to move the to-be-tested piece to one end of a base through a driving device; fixing a soft damage medium on a lower surface of a load device; moving a load positioning device to the to-be-tested area of the to-be-tested piece, and fixing the load positioning device; installing the load device on the base, and making the soft damage medium come into contact with the to-be-tested piece; driving the sample base plate to move relative to the load device through the driving device; driving the sample base plate to return to an initial position by the same way through the driving device; testing the endpoint luster of a rubbed area of the to-be-tested piece; evaluating the mechanical property of a material through the endpoint luster and the initial luster. The method is simple and convenient in operation, a complicated sample pretreatment requirement is avoided, testing medium varieties are easily replaced, the test area is large, and the method is suitable for qualitative and quantitative characterization.

The invention discloses a coated-type composite balance weight and a manufacturing method thereof. The coated-type composite balance weight is made of main materials as industrial mineral waste residue (1) and an inorganic bonding agents (3), wherein the weight of the industrial mineral waste residue accounts for 70-85% of the total weight; the weight of the inorganic bonding agents accounts for 7-25% of the total weight; the coated-type composite balance weight further comprises a reinforcing material (2) which can be short fibers or particulate fibers, and accounts for 0.5-3% of the whole weight; a layer of shell (4) is coated on the outer layer of the coated-type composite balance weight, and materials for preparing the shell can be materials such as rubber and epoxy resin. The coated-type composite balance weight provided by the invention can be compressed and molded once through using a mold, is stable in weight after forming, is high in pressure resistant intensity, is extremely low in moisture absorption rate, is a compound material, can prevent the possibility of being stolen, is good in freezing resistance, is good in durability, has long service life, and can avoid problems of cracking, corner falling, block falling and the like after being used for a long time, so that the quality of the balance weight and the safety of a contact net system can be ensured.

The invention provides a film discharge structure and a detection method used for detecting a reinforcement effect in vacuum prepressing. The detection method comprises that a film discharge tube with a diameter of no less than 90 mm and a length of no less than 1300 mm is prepared at first and then laid on a drainage sand cushion layer, the film discharge tube is embedded into a soft soil layer to be reinforced, a lower-layer geotextile equipped with a film discharge hole and a vacuum film are then laid successively, a rolled edge turned upwards is preserved on the edge of the film discharge hole, the rolled edge is sealed and fixed on the film discharge tube by a PVC adhesive and an elastic binding role, the vacuum prepressing is then carried out for a certain period, a detection probing rod of a detection device at an original position is inserted into the soft soil layer to be reinforced through an upper tube hole of the film discharge tube to realize original position detection, and secondary sealing is carried out to a tube hole of the film discharge tube after the detection. The film discharge structure and the detection method used for detecting the reinforcement effect in the vacuum prepressing provided by the invention satisfy requirements for vacuum degree stabilization under a film and continuous loading and prepressing, and can also satisfy requirements for detecting the soft soil reinforcement effect during the vacuum prepressing or vacuum combined preloading.

The invention relates to cement blocks, with a purpose of providing a lightweight and environmental friendly multi-functional cement block processing technology that is suitable for the traditional operating habit. The processing steps are: a, preparing for materials according to the following weight ratio: 8-13 parts of crushed stones, 1 part of cement, 0.01-0.02 part of polypropylene fiber, and 1-2 parts of glass bead particles; particle size of the crushed stones is 0.03-0.5 cm; b, adding water to the solid material and blending the mixture homogeneously; c, adding the well mixed slurry to a compression moulding press to be moulded, with a moulding pressure bigger than 5 MPa; d, after moulding, placing the blocks on a layer board in the curing room for curing, with a curing temperature of 25-33 oC, and a curing time of 20-30 h in summer, and 36-60 h in winter; after then, placing the blocks in the open air to be watered everyday for curing for more than 28 days; the processing technology can be extensively used in sectors like construction, and hardening of road surface, and so on. Compared with traditional solid clay bricks, the cement blocks have the advantages of low density, good heat insulation property, high strength, and good earthquake resistance.

The invention discloses a bearing related to a telescopically extensible boom (1), comprising an outer arm (5) with a front end and an inner arm (6) which is arranged in the front end and can be moved axially inside the outer arm (5). The outer arm and the inner arm comprise square tubes. Flat surfaces of the inner arm (6) extend along corresponding flat surfaces of the outer arm (5), and the boom (1) has four longitudinal sides. The bearing comprises a bearing box (10) designed as a casing with four walls (10a to 1Od) which together form a square tube structure. The bearing box (10) comprises a plurality of sliding bearings (l1a to 11d, 12a to 12d) and is inserted into the front end of the outer arm (5) between the outer arm (5) and the inner arm (6). The sliding bearings (l1a to 11d, 12a to 12d) are arranged in the walls (10a to 1Od) of the bearing box (10) and are applied against the corresponding flat surfaces of the outer arm (5) and the inner arm (6), wherein the flat surfaces extend along each other. Arranged adjustment devices (15, 20, 17a to 17c) which are related to at least one wall (10a to 10c) and are axially arranged are used for adjusting the gap between at least one sliding bearing (11a to 11c, 12a to 12c) and the applied surfaces of the inner arm (6) and the outer arm (5).

The invention belongs to the technical field of radioactive waste treatment, and relates to a method for deep electrolytic purification of radioactive waste resin Fenton oxidation waste liquid and recovery of sulfuric acid. The method comprises the following steps: (1) sending radioactive waste resin Fenton oxidation waste liquid into an electrolytic cell for electrolysis, the electrolytic cell is divided into an electrolytic cell cathode chamber and an electrolytic cell anode chamber on both sides, and an electrolytic cell cathode chamber is provided with an electrolytic cell; The cathode of the electrolytic cell concentrates the anions, and the anode of the electrolytic cell is arranged in the anode room of the electrolytic cell to concentrate the ions; (2) The electrolysis product in the cathode room of the electrolytic cell is sent to the reduction cell for reduction, and the reduction cell is divided into the cathode room of the reduction cell and the anode of the reduction cell. The cathode chamber of the reduction tank is provided with the cathode of the reduction tank to reduce the radioactive metal nuclide cations flowing into the cathode chamber of the reduction tank, and the anode of the reduction tank is set in the anode chamber of the reduction tank. By using the method of the invention, the purification treatment of radioactive waste resin oxidation waste liquid and the recovery and reuse of sulfuric acid can be better realized.

A near-α-type titanium alloy and a preparation method thereof belong to the technical field of titanium alloy processing. The nearly α-type titanium alloy contains components and the mass percentage of each component: Al is 5.0-6.5%, Sn is 2.0-3.0%, Zr is 3.0-4.0%, Mo is 0.3-0.6%, and Si is 0.3%. ~0.6%, Y is 0.1~0.3%, and the balance is Ti. It is prepared by powder metallurgy billet, hot extrusion molding and subsequent vacuum annealing. Through the powder metallurgy process, segregation can be eliminated and the influence of uneven composition can be avoided. The obtained billet can be directly followed by molding without processing; combined with the hot extrusion process, the defect of low density of powder metallurgy can be eliminated, and at the same time, it can be formed at one time. The final shape of the product is directly extruded to reduce the amount of subsequent processing; the subsequent vacuum annealing process will improve the stability of the alloy. Finally, the application standard is reached.

The invention relates to a high frequency multilayer circuit board hole conduction technology comprising the steps that multiple internal single-layer boards and two external single-layer boards are prepared, the internal single-layer boards and the external single-layer boards comprise a copper layer, a base layer and a low adhesive layer, the internal single-layer boards and the external single-layer boards are provided with positioning holes through the copper layer, the base layer and the low adhesive layer, and internal lines are formed in the copper layers of the internal single-layer boards; conduction holes are arranged on each internal single-layer board and each external single-layer board by using a laser method so that the conduction holes on the internal single-layer boards are enabled to be connected with the internal lines and the conduction holes on the external single-layer boards are enabled to be connected with the copper layer of the external single-layer boards; copper conductors are filled in the conduction holes so that the copper conductors are enabled to be connected with the internal lines of the internal single-layer boards or the copper layer of the external single-layer boards; and multiple internal single-layer boards and two external single-layer boards are combined and connected and external lines are manufactured on the copper layer of the external single-layer boards so as to form the high frequency multilayer circuit board. Compared with the technologies in the prior art, the high frequency multilayer circuit board hole conduction technology is simple and practicable and low in cost.

The invention discloses a bearing related to a telescopically extensible boom (1), comprising an outer arm (5) with a front end and an inner arm (6) which is arranged in the front end and can be moved axially inside the outer arm (5). The outer arm and the inner arm comprise square tubes. Flat surfaces of the inner arm (6) extend along corresponding flat surfaces of the outer arm (5), and the boom (1) has four longitudinal sides. The bearing comprises a bearing box (10) designed as a casing with four walls (10a to 1Od) which together form a square tube structure. The bearing box (10) comprises a plurality of sliding bearings (l1a to 11d, 12a to 12d) and is inserted into the front end of the outer arm (5) between the outer arm (5) and the inner arm (6). The sliding bearings (l1a to 11d, 12a to 12d) are arranged in the walls (10a to 1Od) of the bearing box (10) and are applied against the corresponding flat surfaces of the outer arm (5) and the inner arm (6), wherein the flat surfaces extend along each other. Arranged adjustment devices (15, 20, 17a to 17c) which are related to at least one wall (10a to 10c) and are axially arranged are used for adjusting the gap between at least one sliding bearing (11a to 11c, 12a to 12c) and the applied surfaces of the inner arm (6) and the outer arm (5).