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60results about How to "Easy to store at low temperature" patented technology

Hyper-concentrated liquid detergent and preparation technique thereof

Hyper-concentrated liquid detergent comprises, in percentage by weight, 8-30% of anionic surfactant, 40-60% of nonionic surfactant, 5-15% of cosolvent, 0-10% of auxiliary, 0.005-1% of deflocculant, 0-0.5% of fluorescent brightener, 0-2% of detergent enzymes, 0-0.1% of preservative, 0.1-1% of essence, and the balance of water. The hyper-concentrated liquid detergent has the advantages of high solid content and high deterging effect.
Owner:CHINA RES INST OF DAILY CHEM IND

Heat-conductive insulated adhesive tape for large-power light-emitting diode (LED) and preparation method thereof

The invention discloses a heat-conductive insulated adhesive tape for a large-power light-emitting diode (LED) and a preparation method thereof. The preparation process comprises the following steps: mixing 5-10 parts by weight of mixture consisting of epoxy resin and toughening resin at a weight ratio of 1:1, 5-10 parts by weight of curing agent, 0-3 parts by weight of flexibilizer, 0.5 part by weight of accelerator and 0.5-1.5 parts of coupling agent; dissolving the obtained mixture in a solvent, wherein the weight ratio of the solvent to the mixture is 1:5; stirring for 1 hour, then adding 75-89 parts by weight of heat conductive filling material, and evenly mixing; and coating the obtained mixture on a substrate and carrying out graded curing, wherein the first-stage curing temperature is 80 DEG C, the first-stage curing time is 0.5 hour, the second-stage curing temperature is 120 DEG C, and the second-stage curing time is 1 hour, so that a semi-cured adhesive film is obtained. The heat-conductive insulated adhesive tape has the advantages of high heat conductive coefficient, high bonding strength, low moisture absorption, good room-low temperature storage and the like.
Owner:YANTAI DARBOND TECH

Compound and liquid crystal composition thereof, and applications of liquid crystal composition

The present invention discloses a compound, which comprises at least a cyclic structure and group bonding represented by a general formula I. The present invention further discloses a liquid crystal composition comprising the compound of the present invention, and a photoelectric display device containing the liquid crystal composition. According to the present invention, the compound has advantages of stable chemical property, stable physical property, good low-temperature storage property, appropriate dielectric anisotropy and appropriate refractive index anisotropy; with the application ofthe compound in liquid crystal products, the transmittance of the product can be significantly improved, and the response speed can be significantly improved; and the compound has good compatibility with other liquid crystal compounds, and has wide applicability. The formula I is defined in the specification.
Owner:JIANGSU HECHENG DISPLAY TECHCO

Filling system of pressure differential liquefied natural gas filling station and method thereof

The invention provides a filling system of a pressure differential liquefied natural gas filling station and a method thereof. The filling system comprises a storage tank system, an unloading system, a gas filling system and valve assemblies; the unloading system is arranged between the storage tank system and the tank car of the gas filling station; the gas filling system is arranged between the storage tank system and a gas vehicle to be filled with gas; the valve assembly is arranged in the unloading system, and the unloading system and the storage tank system are connected by use of the valve assembly; the valve assembly is arranged in the storage tank system, and the storage tank system is connected with the gas filling system by use of the valve assembly. The gas vehicles are filled with the liquefied natural gas in a pressure differential manner, and as a result, under the premise that a skid-mounted pump system is omitted, the generation of boil off gas (BOG) is reduced, and the economic efficiency and the environmental protection property are obviously improved.
Owner:陈恳

Industrialized jasmine tea processing method

The invention discloses an industrialized jasmine tea processing method. The industrialized jasmine tea processing method adopting a sectional industrialized technical process includes: jasmine fragrance release with temperature, humidity and air controlled, fragrance gathering by means of negative-pressure air suction and activated carbon adsorption, and subcritical extraction of initial essential oil and flower residue essential oil (in a first blossom stage); tea leaf fragrance adsorption with essential oil temperature controlled, constant-temperature hermetic fragrance curing and low-temperature drying (in a second non-blossom stage). The industrialized jasmine tea processing method has the advantages that automatic and precise control of a jasmine fragrance release environment is realized, and fragrance release time is prolonged; effectiveness in collection of fragrant substances is realized by means of fragrance adsorptive gathering techniques, and owing to subcritical extraction, essential oil quality is improved, and industrial production is facilitated; by means of 'jasmine essential oil-tea' scenting, a traditional scenting mode of mixture of jasmine flowers and tea leaves is broken, possibility of production of scented tea in non-blossom seasons is realized, and automation and industrialization in production of scented tea are realized.
Owner:闽榕茶业有限公司

Safety drying method and drying device for long-term seed storage

The invention relates to a safety drying method and a drying device for long-term seed storage. Five steps of predrying, preheating, drying, tempering and packaging are performed to seeds to safely reduce water content of the seeds to 5-7%, and the seeds are then quickly and hermetically stored in a seed box or seed bag to facilitate next low-temperature storage. The invention further provides the drying device used with the drying method. Main instruments such as a drying chamber, a drying box, a refrigerator, a dehumidifier, a temperature-humidity controller and the like are reasonably distributed and utilized, so that the drying process is optimized and drying efficiency is improved.
Owner:SHANDONG CROP GERMPLASM CENT

3D printing method

ActiveCN107267386AResolve cytotoxicitySolving technical problems of biorejectionAdditive manufacturing apparatusTissue/virus culture apparatusLiquid waterEngineering
The invention relates to the technical field of 3D printing, especially to a 3D printing method. The method comprises: step 1, allowing a refrigeration bed to reach a predetermined temperature; step 2, extruding liquid water to a predetermined position of the refrigeration bed, and during an extrusion process of liquid water, fast freezing the liquid water for solidification to form a first base support; step 3, extruding a biological material to the first base support to form a first biological material layer; step 4, extruding liquid water to the first biological material layer, and fast freezing the liquid water for solidification to form a second base support; step 5, extruding the biological material to the second base support to form a second biological material layer; and step 6, repeating the step 4 and 5 until printing of a 3D model is completed. According to the technical scheme, the technical problem of cytotoxicity and biological rejection due to a support material of 3D printing in the prior art is solved.
Owner:PARTICLE CLOUD BIOTECHNOLOGY (HANGZHOU) CO LTD

Rabbit steak and its production process

The invented rabbit meat steak is composed of (wt. portion) rabbit meat 15-50, chicken meat 6-12, pork 6-12, bread crumb 8-12, corn starch 3-6, wheat flour 6-10, soysauce 1-2, cooking wine 1-2, pepper powder 0.5-1, sodium glutamate 0.1-1, onion 1-3, fresh ginger 1-5, solt 0.5-1, white sugar 0.5-1, water 15-19. The raw amterials are mixed, formed into shape and fried.
Owner:济南绿色兔业集团有限公司 +1

Environment-friendly detection water sample storage device convenient to take

The invention discloses an environment-friendly detection water sample storage device convenient to take. The environment-friendly detection water sample storage device convenient to take comprises astorage box, balls, a sample storage pipe and a valve plate, a refrigeration column is installed in the storage box, a storage sleeve is arranged on the outer side of the refrigeration column, the storage sleeve is also located in the storage box, the balls are arranged between the storage sleeve and the refrigeration column, the storage sleeve is connected with the refrigeration column through the balls, an inserting rod is installed at the upper end of the valve plate, a reset spring is arranged on the outer side of a supporting rod, the reset spring is located on the inner side of a limiting groove, and the supporting rod is connected with the valve plate through the reset spring. According to the environment-friendly detection water sample storage device convenient to take, a water sample can be put into the sample storage pipe to be inserted into a storage cavity to be stored, meanwhile, liquid nitrogen can be injected into the hollow refrigeration column to control the temperature in the storage box and the storage sleeve, then the water sample can be conveniently stored at a low temperature, and the condition of high-temperature evaporation of the water sample is avoided.
Owner:中科检测技术服务(湛江)有限公司

Portable 48-hole low-temperature sample storage box

The invention discloses a portable hole low-temperature sample storage box, and relates to the technical field of detection apparatus. The sample storage box comprises a cryogenic box and an electricappliance box, wherein rubber bags are fixedly connected with the upper ends of four connecting columns, electronic slide rails are arranged on two inner side walls of the cryogenic box, ice crystal storage racks are in sliding connection with insides of the two electronic slide rails, and a packaged air conditioner is arranged on the inner bottom wall of the cryogenic box. By means of supportinglegs, the connecting columns and the rubber bags, after the electric appliance box is dismounted separately, battery charge is convenient; the electronic slide rails, the ice crystal storage racks andsprings, when a small quantity samples are required to be taken out, a box cover is not required to be opened, and low-temperature environment is kept; by means of air deflectors, a turntable and wind screens, airflow disturbance is larger, cold air is distributed more uniformly, and temperature difference in the vertical direction and in the inside-outside direction is reduced; and the samples are cooled in a certain period of time by the ice crystal storage racks and ice crystal cases.
Owner:PINGDINGSHAN UNIVERSITY

Treatment method of seeds of Chinese rose

The invention mainly relates to the technical field of planting and discloses a treatment method of seeds of Chinese rose. The treatment method includes the steps of: soaking seeds, fermenting seeds, drying seeds and accelerating germination of seeds. The method is simple and allows batched processing, can fully utilize aged Chinese rose seeds and accelerate germination of the Chinese rose, reduces germination accelerating time of the Chinese rose to 9-10 days and germinating time after sowing to 12-13 days, increases germination rate by 26.2%, significantly saves resources and reduces planting cost. When the Chinese rose seeds are harvested, the seeds are freeze-dried so as to reduce hardness of seed coats, reduce moisture in seeds and prevent cold injury of the seeds, so that the seeds can be preserved at low temperature with germinating capability of the seeds maintained and germination rate increased. Before sowing, the Chinese rose seeds are soaked in a sodium nitrite solution, which also contains ZnSO4, so that permeation of water into the seeds is promoted, and softening of the seed coats is accelerated and nutrients can enter the seeds easily, thereby stimulating growth of germs and reducing the germination time of the seeds.
Owner:蚌埠市金牛湾农业科技发展有限公司

Low temperature preservation device of test sample for biological gene detection

The invention discloses a low temperature preservation device of a test sample for biological gene detection. The low temperature preservation device comprises a refrigeration box body, a test samplebox body and a test sample block, universal wheels are installed on both ends of a bottom end of the refrigeration box body, a refrigeration pipe penetrating through the refrigeration box body is installed on an output end of an air compressor, one end of the refrigeration pipe away from the air compressor penetrates through a top end of the test sample box body, a third slide rail is horizontallyinstalled at the bottom end in the test sample box body, a hydraulic cylinder is vertically installed at the middle position of the top end of a second slide block, sleeves are uniformly and vertically installed at the top ends of the second slide block on the both sides of the hydraulic cylinder, a metal rod penetrating through the top ends of the sleeve is vertically installed at the top end ofa second spring, a first spring connected with the test sample block is vertically installed at the top end of the sleeve on the outer side of the metal rod, and fourth springs are uniformly and vertically installed at the bottom end in a test sample bin. According to the low temperature preservation device of the test sample for biological gene detection, when the temperature is too high, the air compressor starts to cool to facilitate the low temperature preservation of the test sample.
Owner:魏绘

Preparing method for diesel oil lubricity improver

A preparing method for a diesel oil lubricity improver comprises the steps that straight-chain carboxylic acid and aromatic carboxylic acid are added into a reaction kettle, stirred and mixed evenly, nitrogen is introduced at the same time, heating is slowly carried out, polyalcohol is added when the reaction temperature is increased to 50 DEC C or above, and a reaction is carried out for 4-12 h at 160-220 DEG C; then amine is added, the reaction continues for 4-12 h at 160-220 DEG C, heating is stopped after the reaction is finished, the mixture is cooled to the room temperature, and the diesel oil lubricity improver is obtained.
Owner:PETROCHINA CO LTD +1

Veterinary enrofloxacin injection and preparation method thereof

The invention discloses veterinary enrofloxacin injection and a preparation method thereof, belonging to the technical field of preparation of veterinary drugs. The veterinary enrofloxacin injection is prepared from the following raw materials in percentage by weight: 2-20 percent of enrofloxacin, 2-30 percent of L-arginine alkali, 10-30 percent of a pH value regulator, 0.1-0.2 percent of an antioxidant, 0.01-0.02 percent of a chelating agent, 10-50 percent of an organic solvent, 1-13 percent of a cosolvent, 1-5 percent of a controlled release formulation and the balance of water for injection. The veterinary enrofloxacin injection is high in stability, low in cost and safe and convenient to use and has the advantages of long-acting effect, high efficiency and low drug tolerance. Moreover, the veterinary enrofloxacin injection is compatible with L-arginine alkali to achieve a special effect of treating mixed infection caused by sensitive bacteria and mycoplasma of beasts and birds.
Owner:PIZHOU ZHENGKANG BIOTECH

Powerful detergent

The invention discloses a powerful detergent, which is prepared from the following raw materials by weight: 15-22 parts of fatty alcohol polyoxyethylene ether, 1-4 parts of a mixture of edible alkali and limonene, 10-14 parts of cocoamido propyl hydroxy sulfoBetaine, 1-3 parts of sodium carbonate decahydrate, 1-5 parts of sodium ethylene diamine tetracetate, 0.5-1 part of a mixture of enzyme stabilizer and protease, 16-24 parts of glycerin and 15-22 parts of deionized water. Compared with the prior art, the invention has the following advantages: gel phenomenon does not appear in the preparation process; and the detergent is easy for pouring, accurate in measurement, and convenient for usage, has good low temperature storage effect, does not form gel easily, and can be mixed with water in any ratio without generating gel zone. The detergent has solid content as high as 80%, and very strong detergency.
Owner:QINGDAO JINLIANXIN BUSINESS & TRADE

Vehicle-mounted multi-functional emergency medical kit

The invention discloses a vehicle-mounted multi-functional emergency medical kit and relates to the technical field of medical kits. The vehicle-mounted multi-functional emergency medical kit comprises a kit body, and further comprises a first kit cover, a second kit cover and a third kit cover; one surface of the kit body is rotationally connected with one surface of the third kit cover through afirst hinge; one surface of the kit body is rotationally connected with one surface of the second kit cover through a third hinge; and one surface of the kit body is rotationally connected with one surface of the first kit cover through a second hinge. The vehicle-mounted medical kit is divided into three independent areas; a refrigerator makes drugs more convenient to store at low temperature; afirst kit body and a second support are disposed in the middle of the vehicle-mounted medical kit; a novel second kit body and a third support are designed; and thus the problems that an existing vehicle-mounted medical kit is not reasonable in space layout, large in size and singular in function structure, the storing conditions of the drugs in the kit are not complete, and the sanitation and storage of medical instruments are not reasonable are solved.
Owner:苏州陆康科技开发有限公司

Winter summer double-temperature kitchen balcony integrated kitchen with variable space

The invention relates to a winter summer double-temperature kitchen balcony integrated kitchen with variable space. The winter summer double-temperature kitchen balcony integrated kitchen with the variable space comprises a balcony outer wall, a left side wall, a right side wall, a kitchen entry wall and a kitchen door and further comprises a whole U-shaped cabinet arranged along the lower portion of inner walls of the periphery of the integrated kitchen. Two pairs of top sliding rails parallel to the side walls are fixedly and symmetrically arranged on a roof of the integrated kitchen. A separating glass curtain wall is hung below the top sliding rails through a curtain wall pulley fixedly arranged at an upper edge of a glass curtain wall, and the width of the separating glass curtain wall is the same as that of the kitchen. A door frame, a left glass side wall and a right glass side wall are respectively hinged with the middle portion below the glass curtain wall through a hinge. The two glass side walls are fixedly connected with the door frame through fixing clamps. A glass door is fixedly arranged in the door frame. A door frame side rail is fixedly arranged in a groove below an upper board of the cabinet. The door frame side pulley fixedly arranged on the door frame slides along the door frame side rail. Two bottom ends of the door frame are respectively and fixedly provided with a bottom end pulley. The bottom end pulleys slide along a ground rail fixedly arranged on a floor board. According to the winter summer double-temperature kitchen balcony integrated kitchen with the variable space, space using rate is high, a cold and warm double-temperature area is formed between a balcony and the kitchen and the cold and warm double-temperature area is changed at any time along with change of seasons so that requirements for different conditions of an operator are satisfied.
Owner:钱伟荣

Intelligently-controlled drug hand truck device for hospital

The invention discloses an intelligently-controlled drug hand truck device for a hospital. The device comprises a strip-shaped bearing base, an intelligently-controlled drug bearing mechanism is arranged on the upper surface of the strip-shaped bearing base, and a moving mechanism is arranged on the lower surface of the strip-shaped bearing base. The intelligently-controlled drug hand truck devicehas the advantages that the device is convenient to use and has a large bearing amount, low-temperature storage is facilitated, the surfaces of drugs are conveniently sterilized and disinfected, theusing safety of a patient is guaranteed, and convenience is brought for the device to be remotely controlled properly.
Owner:JIAMUSI UNIVERSITY

Biological agent for promoting plant growth and controlling diseases and pests

The invention relates to a method for preparing a biological agent containing allergenic protein (Harpin). The method is characterized by comprising the following steps: (1) recovery and amplification of strains: taking the working seed bank strains transformed with the allergenic protein (Harpin), and performing thawing and multiplication culture; (2) fermentation in a fermentation tank: 1) performing strain domestication, 2) performing thallus amplification and 3) performing induction expression; (3) treatment of a fermentation broth: slowly adding urea to the fermentation broth until the final urea concentration is 8 mol / L and urea is completely dissolved, continuing stirring for 15-45 minutes, and cooling the liquid composition to 2-8 DEG C.
Owner:湖北微生元生物科技有限公司

Trehalose derivative as well as cryoprotectant and application thereof

The invention discloses a trehalose derivative which comprises trehalose and epichlorohydrin, and the trehalose and the epichlorohydrin are in covalent binding. The trehalose derivative disclosed by the invention is prepared into a cryoprotectant, is suitable for low-temperature cryopreservation of a tissue engineering structure (such as a scaffold) containing living cells, is used as a substitute of DMSO, reduces the use of DMSO, maintains the survival rate and the recovery rate of the cells at a relatively high level, and can enable frozen stem cells to continuously maintain dryness and differentiation potential after recovery.
Owner:章毅 +7

Negative dielectric anisotropy liquid crystal composition and liquid crystal display device

The invention relates to a negative dielectric anisotropy liquid crystal composition and a liquid crystal display device. The negative dielectric anisotropy liquid crystal composition comprises at least one compound as shown in a formula I, at least one compound as shown in a formula II and at least one compound as shown in a formula III. Compared with the prior art, the liquid crystal composition provided by the invention has the technical effects of good response speed and high transmittance on the basis of maintaining proper optical anisotropy value and dielectric anisotropy.
Owner:YANTAI XIANHUA CHEM TECH CO LTD

Method for collecting intestinal flora of inhuman primates in free state

The invention provides a method for collecting the intestinal flora of inhuman primates in a free state. The method comprises the following steps: (1) placing a flexible pad towel and a hard backing board for bearing the flexible pad towel at the bottom of a feeding container of an inhuman primate, wherein the flexible pad towel comprises a water absorbing layer and a waterproof layer, and the waterproof layer is in contact with the hard backing board; and (2) after the defecation of the animal is observed, taking the hard backing board and the flexible pad towel out of the feeding container, and collecting the intestinal flora sample on the flexible pad towel. When the feces and urine of the animal under a free active state fall onto the flexible pad towel, the urine is absorbed by the water absorbing layer to prevent the feces from being mixed with the urine into paste; the waterproof layer can keep the original dryness of the caprophyl and is favorable for keeping the integrity of the intestinal flora sample; and the hard backing board is convenient for taking out the flexible pad towel and collecting the intestinal flora sample on the flexible pad towel. The method has the advantages of big sampling amount, good repeated sampling performance and good integrity of a flora gene sample.
Owner:SHENZHEN INST OF ADVANCED TECH

Decorative putty and preparation method thereof

The invention discloses decorative putty and a preparation method thereof. The decorative putty comprises 30 to 40% of a component A and 60 to 70% of a component B in mass percentage, wherein the component A comprises the following raw materials in mass percentage: 3 to 6% of cellulose, 70 to 75% of water, 15 to 20% of strong alkali, 1.5 to 2% of glycerol, 0.5 to 2% of phosphor and 0.5 to 2% of waterproofing agent Titan D-66; and the component B comprises the following raw materials in mass percentage: 70 to 80% of calcium carbonate and 20 to 30% of talc powder. After commonly-used putty is used on a wall, paint is required to achieve a decorative effect. The decorative putty has a decorative feature, so that after the decorative putty is plastered and calendered according to the conventional method, paint is not required; the decorative putty is very bright in surface and good in hand feel; and a leveling and decorating effect can be achieved by one time, so that materials, labor and time are greatly saved.
Owner:广东景龙建设集团有限公司

Preparation method of ester diesel anti-wear agent

The invention relates to a diesel anti-wear agent with low cost and excellent anti-wear effect. The diesel anti-wear agent has the characteristics of low acid value, good low-temperature storage performance, lubricating property and the like. The ester diesel anti-wear agent provided by the invention consists of higher fatty acid, polyol, a catalyst, a water carrying agent and a small-molecular alcohol solvent. The preparation method comprises the following steps: under the protection of nitrogen, adding the higher fatty acid and the polyol into a reaction kettle according to a certain proportion, adding the catalyst and the water carrying agent, carrying out heating to 80-130 DEG C under mechanical stirring, carrying out a reaction for 4-6 hours, then adding the small-molecular alcohol solvent when the temperature is reduced to 30-60 DEG C, then carrying out heating to 90-120 DEG C, carrying out a reaction for 2 hours, carrying out vacuum dehydration on the reaction system for 30-60 minutes after the reaction is finished, and filtering and recycling the catalyst for reuse. The diesel anti-wear agent related to by the invention has a simple and efficient synthetic method, is environmentally friendly, and has strong controllability of process parameters.
Owner:NINGXIA PAGODA CHEM CENT LAB CO LTD

Liquid crystal composition and display unit containing the same

ActiveCN107286955AHigh clarification temperatureGood Refractive AnisotropyLiquid crystal compositionsNon-linear opticsDielectric anisotropyPhotochemistry
The invention relates to a liquid crystal composition containing at least one compound shown in a chemical formula 1, at least one compound shown in a chemical formula 2, and at least one compound shown in a chemical formula 3. The liquid crystal composition is applied in a display unit, has high clear point temperature, good refraction anisotropy, good dielectric anisotropy and good low-temperature storage property and is suitable for requirements of following application. [chemical formula 1] [chemical formula 2] [chemical formula 3] are shown in the description, and ranges of substituent groups in the chemical formulas are shown in the description and the claim.
Owner:DAXIN MATERIALS

Improved concentrated detergent

The invention discloses an improved concentrated detergent, which is prepared from the following raw materials in parts by weight: 15-22 parts of sorbitol, 1-4 parts of mixture of dietary alkali and limonene, 10-14 parts of cocamidopropyl hydroxysulfobetaine, 1-3 parts of sodium carbonate decahydrate, 1-5 parts of hydrogen peroxide, 0.5-1 part of mixture of enzyme stabilizer and protease, 16-24 parts of glycerin and 15-22 parts of chitosan. Compared with the prior art, the improved concentrated detergent has the following advantages that a gel phenomenon is eliminated in the preparation process, and the detergent is easy to pour out, accurate in metering and convenient to use; the detergent has a good low-temperature preservation effect, and is unlikely to form gel; when the detergent is mixed with water in any ratio, a gel zone is avoided; and the solid content of the detergent can reach 80%, so the detergency is strong.
Owner:QINGDAO JINLIANXIN BUSINESS & TRADE

Aromatic ring liquid crystal compound and liquid crystal composition and application thereof

The invention relates to an aromatic ring liquid crystal compound, a liquid crystal composition and an assembly suitable for a microwave region and a millimeter wave region of a high-frequency technology or an electromagnetic spectrum, and particularly a phase shifter and a microwave array antenna. The liquid crystal composition provided by the invention at least comprises a compound represented by a general formula I. The liquid crystal composition provided by the invention is good in stability, high in response speed and wide in liquid crystal phase temperature range.
Owner:YANTAI XIANHUA CHEM TECH CO LTD

Surface treatment method for bipolar plate of fuel cell

The invention provides a surface treatment method for a bipolar plate of a fuel cell. The surface treatment method comprises the following steps: S1, cleaning the bipolar plate; S2, drying the cleanedbipolar plate; S3, preparing a nanoscale conductive hydrophobic layer on the surface of the dried bipolar plate; and S4, roughening the bipolar plate after the nanoscale conductive hydrophobic layeris prepared so as to improve the roughness of the nanoscale conductive hydrophobic layer. By the surface treatment method, the hydrophobic property of the surface of the bipolar plate can be improvedeffectively.
Owner:佛山市清极能源科技有限公司
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