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introduction： Low speed：Thousands of revolutions per minute High speed：Per minute1 ~ 3Ten thousand revolutions overspeed：Per minute3Over 10,000 revolutions Continuous flow： Function of centrifuge：separate，purification Low speed：Large molecules such as cells High speed：DNA，albumen overspeed: virus，albumen，According to the use can be divided into analysis of ultra-centrifuge and preparation of ultra-centrifuge。 Continuous flow：Continuous sample addition
2014-12-18 Reading quantity 2799
introduction： The application of nanotechnology in mold The manufacture of nano-powders or particles is currently the most successful commercial application of nanotechnology，But it wasnt really a breakthrough invention，Instead, the traditional microfabrication techniques of the past were used，Then we introduce the nano concept，To create new technological concepts。If you want to talk about breakthrough、Forward-thinking innovations，Nano components or nanomechanical devices may be more relevant，In this regard，The scientists early vision was，Using nanorobots with artificial intelligence，To realize the automation of nano products、The goal of mass production，That is, using nanomachines
2014-12-18 Reading quantity 2818
introduction：With the development of modern science and technology，Various engineering materials with high hardness are being used more and more，However, the traditional turning technology is not competent or can not realize the processing of some high hardness materials。Coated carbide、ceramic、PCBNSuch superhard tool materials because of their high temperature hardness、Wear resistance and thermochemical stability，This provides the most basic prerequisite for the machining of high hardness materials，And the obvious benefit has been obtained in the production。 Superhard cutting tools and their selection The material used by the superhard tool and its tool structure and geometric parameters are realized
2014-12-18 Reading quantity 2852
introduction： In order to meet the requirements of market development，Xing Gang Zi2002New Year on12000m3/hOxygen generator，Among them, the air turbine compressor motor is manufactured by Siemens of Germany，Motor type636-4HX60-Z，Rated power6120kW，voltage6000V，Electric current680A，Rated speed2980r／min，Star connection。When using full pressure direct starting，Starting current6.8times，achieve4500A，The power grid voltage drops，The normal operation of other electrical equipment in the common network is affected，Synchronous machine
2014-12-18 Reading quantity 2895
introduction：pick to：Nanometer scale was prepared by high energy ball millingＷMixed powder with rare earth oxides，Cathode block materials with nanometer grain size were prepared by hot pressing sintering。The reason why nanocrystalline cathode materials have better arc initiation performance than traditional cathode materials is analyzed。 keyword：nanometerＷ；High energy ball milling；Cathode material With tungsten inert gas shielded welding（ＴＩＧ）Sum plasma（ＰＬＡＳＭＡ）Automatic welding in the same neighborhood，Plasma injection、slice，A series of new technologies such as high-precision welding、The rise of new technologies，The electrode material is required to have outstanding reliability and stability。Hot electron emission properties、since
2014-12-18 Reading quantity 2847
introduction：one、Methods for surface treatment of aluminium and aluminium alloys [method1] Degreasing treatment。Wipe with absorbent cotton wet solvent，After degreasing，Then wipe with a clean cotton cloth several times。Common solvents are：trichloroethylene、Ethyl acetate、acetone、Butanone and gasoline。 [method2] After degreasing, it is chemically treated in the following solution： Concentrated sulfuric acid 27.3 Potassium dichromate 7.5 water 65.2 in60-65°C impregnate10-30min Remove and rinse with water，Dry or in80°C
2014-12-18 Reading quantity 2812
introduction：sanzhuang wuliao Bulk material bulk material A mass of unpacked lumps piled together、graininess、Powder material(Short bulk)，Such as coal、sand、Grain、Cement and candy bars。Bulk materials are mostly transported by conveyors。Bulk materials and material handling machinery selection related to the main characteristics of the following aspects。①granularity():Bulk particle(Or block)The maximum line length。Because there are many particles of bulk material and the size of each particle varies，Only the particle size of typical particles can be used as the particle size of a batch of bulk materials。through（Or not through）Bulk material for screening，Canon
2014-12-18 Reading quantity 2817
introduction： 2014years2month24day，The 8th China CNC Machine Tool Exhibition was held in Shanghai New International Expo Center，Yuhuan CNC Machine tool Co., Ltd. with complete sets of automation equipment、Sapphire grinding and polishing and other sophisticated new products wonderful appearance，Mark the company on the road to innovation transformation to achieve a magnificent turn，Electromagnetic clutch introduction from the production of a single equipment transformation and upgrading to provide customers with a whole set of automated equipment production line。YHZD001Intelligent double plane processing equipment is the representative product of the companys transformation， Fill the gap in the country，The overall technology has reached the international advanced level，Enhanced the Hunan machine tool industry in the country and even
2014-12-18 Reading quantity 2809
introduction： Automatic clutch1Gear display：By number、Letters indicate the gear or fault code; Shift clutch：The clutch disengages automatically when shifting、unite; Starting crawl：At the beginning，It can automatically slow down without stepping on the accelerator pedal; Brake clutch：During the braking process, the clutch is automatically separated according to the working condition、unite; Flameout protection：The clutch disengages automatically when the speed is too low，Combine in time according to working conditions，Therefore, the engine will not be turned off in any gear; Misoperation protection：The gear blinks when the shift is wrong，
2014-12-18 Reading quantity 2823
introduction： E（normal）、EW（Wide inner ring）andG（In the）Series radial joint bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Radial clearance value bearing[bearing:bearing（“Bearing
2014-12-18 Reading quantity 1481
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