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32results about How to "Relieve great pressure" patented technology

Low-cost sulfur-tolerant shift catalyst and preparation method

The invention provides a low-cost sulfur-tolerant shift catalyst and a preparation method. The low-cost sulfur-tolerant shift catalyst adopts magnesium, aluminum, silicon and titanium as carrier components, wherein oxides of the aluminum and the silicon mainly come from coal ash in a coal-fired thermal power plant; cobalt and molybdenum are taken as active components; and rear earth metal is taken as a coagent. The coal ash with a wide source and a low cost is taken as a raw material of the catalyst to partially or totally replace common aluminum oxide or aluminum-contained compounds in the conventional catalyst, so that the production cost of the catalyst can be greatly reduced, an effective utilization means is created for the coal ash, the great pressure on an ecological environment caused by the coal ash is alleviated, and the catalyst has good economical benefits and environmental protection benefits. The catalyst provided by the invention has the advantages of high intensity, good structural and active stability, low wastage rate of active components, and long service life, and is applicable to conditions with high pressure, a high air speed and a high water-air ratio.
Owner:CHINA PETROLEUM & CHEM CORP

Data acquisition optimization method and system

The invention discloses a data acquisition optimization method and a data acquisition optimization system. The method comprises the following steps that: an operation and maintenance centre (OMC) determines a uniform minimal report particle size for each network element, configures the offset of a report time for each network element according to the minimal report particle size, and transmits an offset-containing performance task to each network element; and after receiving the performance task, the network element determines the report time for reporting performance data according to the offset in the performance task. By adopting the data acquisition optimization method and the data acquisition optimization system provided by the invention, tremendous pressure, caused by large amount of file transmission, of the OMC can be avoided and the load of a server can be reduced.
Owner:ZTE CORP

Method for preparing efficient oil-water separation sponge

The invention discloses a method for preparing efficient oil-water separation sponge. Porous sponge sold on the market is adopted as a base body, an addition reaction of polymethylhydrosiloxane (PHMS) and tetravinyl tetramethylcyclotetrasiloxane (Vid4) is adopted, an organosiloxane coating is established on the surface of the sponge, that is, an organic silicone hydrophobic material is obtained, and thus the efficient oil-water separation sponge with a high superhydrophobicity characteristic and a super-oleophilicity characteristic is prepared. The method is simple in operation, raw materials are cheap and easy to obtain, the prepared efficient oil-water separation sponge can separate oil / water mixtures in a layered mode efficiently and automatically and can be recycled, and a new thought is provided for developing an intelligent oil-water separation material and relieving huge pressure of the ecological environment.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

AP upgrading method and device thereof

The present invention provides an AP upgrading method applied to an upgrading server. The method comprises the following steps of (A) regularly collecting the resource utilization rate of an upgrading server and the AP information of upgrading, (B) judging whether the upgrading AP state of the upgrading server is saturated according to the AP information of upgrading if the condition that the resource utilization rate is smaller than a first preset threshold value is detected, if so, going to step (C), otherwise going to step (D), (C) controlling the upgrading AP number of the upgrading server according to the resource utilization rate and the AP information of upgrading, (D) issuing an upgrading packet to the AP and notifying the AP to carry out upgrading. According to the AP upgrading method, the problem of large pressure of the upgrading server caused by a large number of AP upgrading can be effectively alleviated, and the stable completion of upgrading even with thousands of APs is ensured.
Owner:HANGZHOU DPTECH TECH

Pressure-adjustable floating polishing device

PendingCN105690198ASolve the problem of stuck and burnedRelieve great pressureGrinding carriagesGrinding bedsPolishingMachine
The invention provides a pressure-adjustable floating polishing device. The pressure-adjustable floating polishing device comprises a polishing machine and further comprises polishing machine connection plates, the polishing machine connection plates comprise the upper polishing machine connection plate and the lower polishing machine connection plate, and the polishing machine is fixed to the lower side of the lower polishing machine connection plate. A rotary mechanism and a floating mechanism are disposed between the upper polishing machine connection plate and the lower polishing machine connection plate. By means of the arrangement of the floating mechanism, huge pressure caused by uneven workpiece surfaces can be relieved when the polishing device works, and the problem that during polishing, a polishing machine is stuck and burnt out due to small difference is solved. The grinding speed of the floating polishing device is high, the grinding amount is large, the plane grinding effect is good, and the floating polishing device is more stable and safer compared with the electric spindle polishing mode and the mode that a robot directly clamps the polishing machine for polishing.
Owner:SHANDONG ROBOT INTELLIGENT TECH

Cable and cable component

The invention provides a cable and a cable component. The cable comprises a cable reinforcing core, conductors, a wrapping layer for wrapping the cable reinforcing core and the conductor, a tensile and compressive mechanism for protecting the cable, and an adaptive protection mechanism for assisting the cable to adapt to an underwater environment. The surface of the cable reinforcing core is sleeved with an inner wrapping layer, the plurality of conductors are arranged around the cable reinforcing core, and the surface of each conductor is sleeved with an insulating layer. The invention relates to the field of cables. According to the cable and the cable component, two mutually associated special structures are arranged, for the problems of cables under trees, the large pressure borne by the cable is relieved, and the underwater adaptability of the cable is enhanced, thereby effectively solving the problems that when a common cable is used underwater, the pulling time and strength of the cable are large, the cable is liable to be rolled, the internal structure of the cable is liable to be delaminated and damaged, the maintenance work difficulty of the damaged cable is large, and the cost is high.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO

Method for preparing 1,3-butadiene through electro-catalytic acetylene coupling

The invention relates to a method for preparing 1,3-butadiene by electrocatalytic acetylene coupling, and a gas diffusion electrode electrolytic tank is adopted. A gas diffusion electrode is adopted,a catalyst is sprayed on a gas diffusion layer substrate (including conductive carbon paper and metal) to prepare the gas diffusion electrode, and a cathode and an anode are isolated by an ion exchange membrane. A three-electrode or two-electrode system constant-voltage method is adopted to carry out electrochemical performance test, wherein the reaction gas is high-purity acetylene. Experimentalresults show that the Faraday efficiency of the target product 1,3-butadiene reaches 70% or more by regulating and controlling a proper voltage range, and byproducts ethylene and hydrogen are easy toseparate from 1,3-butadiene. Compared with a traditional thermocatalysis technology, the method has the advantages that the production cost of 1,3-butadiene can be effectively reduced, the huge pressure brought by the coal-rich lean oil energy resource structure in China is relieved, the technical requirements of green chemical engineering are met, and the method has great strategic significance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

ICT system fault analysis method integrating text classification and image recognition

The invention discloses an ICT system fault analysis method integrating text classification and image recognition, and belongs to the technical field of fault analysis based on neural network learning. The method comprises the steps that fault data of customer service records are collected, the data are manually preprocessed including two parallel processes of text classification and image recognition, and finally classifier classification needs to be carried out in the two processes; then, through fault judgment, a fault analysis model is established for fault analysis, and initial data is returned for manual preprocessing after model updating. According to the invention, reasonable allocation of ICT system resources is realized; huge pressure brought to customer service operation and maintenance by the increasing number of ICT systems is relieved, the problems that knowledge cannot be shared, internal resources cannot be efficiently coordinated and orderly operated and the like due to the fact that state grid ICT customer service only depends on personal knowledge reserve and experience at the present stage are solved, and the intelligent level of ICT operation and maintenance isimproved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3

Storage method and storage device for prescriptions

The present invention provides a storage method for prescriptions. The method comprises the steps of storing already written prescriptions in a terminal upon detecting that a network or a server is not available when the prescriptions are written by the terminal through the B / S application; upon detecting that the network or the server is recovered to be normal, establishing the connection between the terminal and the server through the network and uploading the already stored prescriptions to the server by the terminal. Accordingly, the invention provides a storage device for prescriptions. According to the technical scheme of the invention, when the network breaks down, the information system of the hospital can still be used. Meanwhile, doctors can write and print the prescriptions. Based on the above manner, the emergency treatment can be completed while no data are lost. In this way, the tremendous pressure of a hospital caused by the fault of the network / system can be greatly relieved. The social influence caused by system problems is reduced.
Owner:PKU HEALTHCARE IT

Method for providing blessing pilgrimage through network platform

The invention belongs to the field of religions and provides a method for providing blessing pilgrimage through a network platform by aiming at the situation that existing religious blessing needs to be performed on site. According to the method, at least one entity platform, a data collection device and an APP client are provided, wherein the at least one entity platform is used as a blessing pilgrimage activity place, the data collection device which is connected with an internet is used for recording the entity platform and uploading contents recorded by the data collection device to the internet, and the APP client is connected with the internet, so as to receive and read data of the internet. According to the method, blessing can be directly performed on line through the network platform, the traditional blessing culture of China can be inherited and developed, additionally, people can bless without going out or buying real joss sticks and candles and various offerings, spiritual needs of the people are satisfied, environmental pollution caused by combustion of the joss sticks and the candles is reduced, and great pressure brought to social public traffic resources when the people go out to bless can be effectively relieved.
Owner:叶飞雁

Equipment updating method and device, storage medium and electronic device

The invention discloses an equipment updating method and device, a storage medium and an electronic device. The method comprises the following steps: collecting a gradient updating strategy; and performing gradient updating on OTA equipment in an updating list according to the gradient updating strategy, wherein the updating list is used for storing the OTA equipment to be updated. According to the method and the device, the technical problem of relatively high resource consumption of equipment upgrading in related technologies is solved.
Owner:GREE ELECTRIC APPLIANCES INC +1

A kind of preparation method of modified graphene reinforced polyurethane sponge for oil-water separation

The invention relates to the field of high molecular materials, in particular to a preparation method of modified graphene enhanced polyurethane sponge used for oil-water separation. Polydopamine modified graphene is adopted, superhydrophobic modified graphene powder is prepared through Michael addition reaction of low-surface-energy substances of 1H, 1H, 2H, 2H-perfluorodecyl mercaptan and the like with polydopamine, the superhydrophobic powder is loaded on the market polyurethane sponge, and the superhydrophobic / oleophylic oil-water separation is obtained. The preparation method is simple in operation, the prepared modified graphene enhanced polyurethane sponge can rapidly adsorbed oil and various organic solvents on the water or even under water, and efficient water-oil separation is realized; the sponge can be recycled by an extrusion deoiling method; the preparation method has the advantages of high operability, low cost, good repeatability and the like; scale production can be performed, and the preparation method is hopefully applicable to removal of water body oil pollutants to alleviate enormous pressure of ecological environment.
Owner:青岛石创科技有限公司

Polyimide fiber repeatable medical protective clothing material and preparation method thereof

The invention belongs to the field of biomedical engineering, and relates to a medical multifunctional protective clothing material and a preparation method thereof. The material comprises a protective layer, an isolation layer and a protective layer which are sequentially arranged, the lower surface of the protective layer is connected with the upper surface of the isolation layer, the lower surface of the isolation layer is connected with the upper surface of the protective layer, the protective layer, the isolation layer and the protective layer are compounded into a whole, the protective layer is made of polyimide fiber fabric, the isolation layer is made of multifunctional nano-microporous film materials, and the protective layer is a polyimide fiber blended fabric. By utilizing hydrolysis resistance, high-temperature resistance, flame retardance, acid and alkali resistance, radiation resistance, oxidation resistance, antibacterial property, skin friendliness, good processing performance, good air and moisture permeability, high-temperature resistance and high-pressure resistance of the polyimide fibers, the polyimide fibers can be repeatedly used after being cleaned and disinfected, and the problems that disposable protective clothing is poor in air and moisture permeability and cannot be repeatedly used are solved.
Owner:JIANGSU AOSHEN HI TECH MATERIALS CO LTD

Pavement structure for reducing urban rainwater flood and pollution

The invention belongs to the technical field of rainwater recycling, and provides a pavement structure for reducing urban rainwater flood and pollution. External structural walls are arranged on the two sides, an indoor structural wall is arranged in the middle, the external structural walls are higher than the indoor structural wall, a top plate is arranged at the top of the indoor structural wall, the external structural walls are arranged at the two ends of the top plate, a roof panel is arranged below the top plate by 1-2 m, and roof water storage cavities are defined by the indoor structural wall, the external structural walls, the roof panel and the top plate on the two sides of the indoor structural wall respectively. A top downpipe is arranged on the upper portion of the outer side of the outer structural wall, a sundry sliding net is arranged under the top downpipe, and the sundry sliding net horizontally inclines downwards by 30-45 degrees. The pavement structure is advantageous in that through omnibearing collection of rainwater on the building roof and the pavement and high-efficiency rainwater storage, runoff pollution is effectively controlled while urban rainwater flood and huge pressure of an urban drainage system are obviously relieved.
Owner:吉林建筑科技学院

A kind of cable and cable assembly

The invention provides a cable and a cable component. The cable comprises a cable reinforcing core, conductors, a wrapping layer for wrapping the cable reinforcing core and the conductor, a tensile and compressive mechanism for protecting the cable, and an adaptive protection mechanism for assisting the cable to adapt to an underwater environment. The surface of the cable reinforcing core is sleeved with an inner wrapping layer, the plurality of conductors are arranged around the cable reinforcing core, and the surface of each conductor is sleeved with an insulating layer. The invention relates to the field of cables. According to the cable and the cable component, two mutually associated special structures are arranged, for the problems of cables under trees, the large pressure borne by the cable is relieved, and the underwater adaptability of the cable is enhanced, thereby effectively solving the problems that when a common cable is used underwater, the pulling time and strength of the cable are large, the cable is liable to be rolled, the internal structure of the cable is liable to be delaminated and damaged, the maintenance work difficulty of the damaged cable is large, and the cost is high.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO

Fully-weathered sandstone high slope excavation construction method

The invention discloses a fully-weathered sandstone high slope excavation construction method. The fully-weathered sandstone high slope excavation construction method comprises the following steps ofstep I, excavating a french drain and a water collecting well, arranging hollow anchor pipes, and pumping water by adopting a water pump until the horizontal line of underground water reaches a presetconstruction elevation; step II, performing segmented construction in the longitudinal direction, arranging two groups of high-pressure jet grouting piles, namely a group of inner high-pressure jet grouting piles and a group of outer high-pressure jet grouting piles, arranging concrete top beams at the tops of the high-pressure jet grouting piles, and enabling one high-pressure jet grouting pilein the inner row to be in reinforced connection with the two adjacent high-pressure jet grouting piles in the outer row through a plurality of steel bars; step III, digging out earth till the construction depth of the foundation pit is reached; step IV, arranging a first steel-concrete layer, a waterproof agent layer and a rubber layer along the side wall of the foundation pit; step V, arranging arubber asphalt layer and a second steel-concrete layer according to the preset slope inclination angle, and pre-burying a plurality of hollow anchor pipes; and step VI, repeating step I to step V until the depth of the foundation pit reaches the preset elevation. The method has the beneficial effects that the water stopping effect in the foundation pit excavation process of a whole sandstone layer is outstanding, and supporting is safe and reliable.
Owner:CCCC THIRD HIGHWAY ENG

Crude octanol liquid phase hydrogenation catalyst and preparation method thereof

The invention belongs to the field of hydrogenation, and particularly relates to a catalyst for liquid phase hydrogenation of crude octanol (containing isooctanol, octenol, octenal, other unsaturatedlight components and unsaturated heavy components) through a fixed bed reactor and a preparation method. The catalyst provided by the invention contains 5-45wt.% of NiO and the balance of SiO2 and Al2O3 as main components, and the mass ratio of Al2O3 to SiO2 is 1.35-2.5 (mass ratio); wherein more than 95% of pores in the catalyst are mesopores, pores of 6-8nm are mainly used, and the specific porevolume of the catalyst is more than or equal to 0.42 cm < 3 > / g. The catalyst has a proper pore structure, is beneficial to hydrogenation reaction of aldehydes, and is wide in range of adapting to process conditions and high in hydrogenation activity; according to the preparation method, the preparation cost of the catalyst is greatly reduced, an effective way is found for comprehensive utilization of a waste catalytic cracking catalyst, and good economic benefits and social benefits are achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1

Program processing method, system and device

The invention provides a program processing method, a program processing system and a program processing device. The method comprises the following steps of: acquiring the theoretical number of copies cached in a distributed Hash table (DHT) network corresponding to the name of a program according to a visitor volume corresponding to the name of the program in a pre-stored program directory at certain time intervals; judging whether the theoretical number of the copies is greater or less than the actual number of the copies, and if the theoretical number of the copies is judged to be greater than the actual number of the copies, performing Hash calculation on the name of the program and numbers of newly added copies according to a Hash algorithm to obtain Hash values corresponding to the numbers of each newly added copy respectively; and carrying the name of the program, the Hash values corresponding to the numbers of each newly added copy corresponding to the name of the program, and an address of a source server in a copy adding message, and transmitting the copy adding message to a cache server corresponding to the Hash values in the DHT network for the cache server to acquire program data corresponding to the name of the program from the source server corresponding to the address of the source server according to the copy adding message and save the program data as the copies.
Owner:HUAWEI TECH CO LTD +1

Silicon powder suddenly-expanded cavern structure adopted at water delivery system valve segment and construction method thereof

The invention relates to a silicon powder suddenly-expanded cavern structure adopted at a water delivery system valve segment and a construction method thereof, aiming at breaking through the bottle neck of a high head ship lock design, developing application range of the ship lock, reducing construction investment, and realizing good pressure-reducing effect. The technical scheme of the invention is as follows: the water delivery system valve segment adopts a silicon powder suddenly-expanded cavern structure which comprises base plates forming the ship lock water delivery system valve segment and side blocks at two sides of the valve segment; a water delivery channel passes through the upstream and downstream of the ship lock; and a valve groove is arranged at the upstream segment of thewater delivery channel. The silicon powder suddenly-expanded cavern structure is characterized in that an expanded cavern structure is formed by externally expanding the bottom of the water delivery channel adjoining the valve groove and at two sides thereof; and the whole suddenly-expanded water delivery channel is equivalent to be coated with a layer of high-strength silicon powder concrete. The silicon powder suddenly-expanded cavern structure of the invention is mainly used for solving the technical difficulty of unsteady flow cavitation of the high-head ship lock water delivery valve segment.
Owner:POWERCHINA HUADONG ENG COPORATION LTD

Sulfur-tolerant shift catalyst and preparation method thereof

The invention relates to a sulfur-tolerant shift catalyst and a preparation method thereof, wherein the carrier comprises the oxides of Mg, Al, Si, Ti and Ba, and the oxides of Al, Si and Ba are derived from a FCC waste agent. According to the present invention, by effectively utilizing the FCC waste agent, the catalyst production cost is reduced, the tremendous pressure on the ecological environment due to the FCC waste agent is alleviated, and the good economic and environmental benefits are achieved; and the catalyst has advantages of high strength, good structure, good activity stability,low loss rate of active components and long service life, and is suitable for the conditions of high pressure, high space velocity and high water vapor ratio.
Owner:CHINA PETROLEUM & CHEM CORP

Non-coding software system pressure testing method and system

The invention provides a non-coding software system pressure testing method and system. According to the method, a complete pressure measurement process is divided into multiple rounds, pressure measurement data are sent to a server in a set time in each round, and the comprehensive performance of the server in the round is obtained through statistical analysis of pressure measurement results. The pressure is gradually increased in multiple rounds, system response curves under different pressures can be described, comprehensive response indexes of the system can be visually reflected, and then performance degradation inflection points and potential system bottlenecks are explored. A tool realized according to the method has wide applicability and usability, more importantly, all control parameters and business data related to voltage measurement are set through excel files, coding is not needed, the technical threshold of voltage measurement is greatly reduced, the fundamental purposiveness is that testers without coding capability can deeply participate in the field of automatic testing in the whole course, and the system contributes to the business insight speciality, and can enable the automatic testing to be preposed to the development process, thereby forming the benign collaborative interaction between the development and testing teams.
Owner:SHEN SU AUTOMATION TECH DEV CO LTD

Hydrocarbon steam conversion lower-stage catalyst and preparation method thereof

The invention belongs to the field of hydrocarbon steam conversion, and particularly relates to a hydrocarbon steam conversion lower-stage catalyst as well as a preparation method and application thereof. According to the preparation method of the catalyst provided by the invention, a waste catalytic cracking catalyst is used as a raw material and is subjected to acid treatment and roasting, a treated waste agent is used as a carrier, a nickel component is introduced through an impregnation method, and molding and aging are performed to obtain a catalyst finished product. The active componentsof the catalyst are good in dispersion in the carrier and not easy to lose, and the catalyst is good in catalyst structure and activity stability, capable of adapting to existing hydrocarbon steam conversion lower-section process conditions, long in service life, and obviously in cost advantage. According to the preparation method, the preparation cost of the catalyst is greatly reduced, a relatively effective way is found for comprehensive utilization of the waste catalytic cracking catalyst, the huge pressure of the molecular sieve waste agent on the ecological environment is effectively relieved, and the preparation method has good economic benefits and social benefits.
Owner:CHINA PETROLEUM & CHEM CORP +1

Low-cost sulfur-tolerant shift catalyst and preparation method

The invention provides a low-cost sulfur-tolerant shift catalyst and a preparation method. The low-cost sulfur-tolerant shift catalyst adopts magnesium, aluminum, silicon and titanium as carrier components, wherein oxides of the aluminum and the silicon mainly come from coal ash in a coal-fired thermal power plant; cobalt and molybdenum are taken as active components; and rear earth metal is taken as a coagent. The coal ash with a wide source and a low cost is taken as a raw material of the catalyst to partially or totally replace common aluminum oxide or aluminum-contained compounds in the conventional catalyst, so that the production cost of the catalyst can be greatly reduced, an effective utilization means is created for the coal ash, the great pressure on an ecological environment caused by the coal ash is alleviated, and the catalyst has good economical benefits and environmental protection benefits. The catalyst provided by the invention has the advantages of high intensity, good structural and active stability, low wastage rate of active components, and long service life, and is applicable to conditions with high pressure, a high air speed and a high water-air ratio.
Owner:CHINA PETROLEUM & CHEM CORP

Gaseous hydrocarbon steam conversion upper-section catalyst and preparation method thereof

The invention belongs to the technical field of hydrocarbon-based steam conversion, and particularly relates to a gaseous hydrocarbon steam conversion upper-section catalyst and a preparation method thereof. According to the catalyst, nickel and rare earth are used as active components; the NiO content in the catalyst is 5-25 wt%, and the rare earth metal oxide content is 0.3-15 wt%; the active components nickel and rare earth are loaded on the carrier by using a co-impregnation method; and the carrier preparation method comprises: (1) FCC catalyst waste agent treatment, wherein a FCC catalystwaste agent is calcined in an air atmosphere, and crushing and screening are performed to obtain powder, and (2) carrier preparation, wherein the powder, magnesium oxide, an anti-carbon auxiliary agent, a pore-forming agent, a lubricant and a binder are mixed, ball milling, kneading, granulation and extrusion molding are performed to obtain a raw ring, and curing, drying and roasting are performed to obtain the carrier. According to the present invention, the catalyst has advantages of good carbon resistance, good mechanical strength and good conversion activity, and is used for preparing hydrogen or carbonyl synthesis gas by combining with the lower-section catalyst; and the preparation method has characteristics of simple process and low cost.
Owner:CHINA PETROLEUM & CHEM CORP

Passive building flat roof thermal insulation and waterproof system and partitioned dry operation construction method

The invention discloses a passive building flat roof heat preservation and water prevention system which is composed of a steam isolation layer, a heat preservation layer, a self-adhesion waterproof layer and a hot melting waterproof layer which are arranged on a concrete base layer. A construction method comprises conducting construction preparation, brushing an interface agent, mounting drain lower fitting, conducting vapor barrier construction, conducting planar thermal insulation layer pavement, conducting planar adhesive coil material construction, conducting vertical face heat preservation layer construction, mounting a drain gully upper accessory, paving and pasting a vertical surface self-adhesive coiled material, and conducting hot-melt coiled material construction. The waterproofperformance of the roof is improved; the drying of the heat preservation layer can be effectively ensured; the quality is not influenced by cloudy and rainy weather; the construction is simple; joints are easy to process; the construction speed is high, and the roof of 1000 m <2> is taken as an example, the construction period is shortened by 15 days compared with that of traditional roof construction; the manufacturing cost of the passive building flat roof heat preservation and waterproof system is 30% lower than that of a common roof, an SD value is larger than or equal to 1500 m, and a heat conductivity coefficient is smaller than or equal to 0.015 [W / (m.K)].
Owner:WEIFANG CHANGDA CONSTR GROUP
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