查询词典 vacuum tube

The invention provides a method for preparing a tube-shaped cathode of a direct methanol fuel cell, belonging to the fuel cell field and comprising the steps of: dispensing a single solution for gel injection molding at first, then adding a mesophase bituminous coal micro ball into the single solution and stirring evenly to obtain stable slurry, then casting the slurry into a die, preserving heat until the single solution reacts with a cross-linker completely to obtain a carbon-biscuit, after drying and sintering the biscuit in vacuum, preparing a diffusion layer and a catalyst layer on the surface by dipping process, and then coating polyester electrolyte membrane with a burette, rolling the carbon on a warm table to solidify the electrolyte membrane.

一种制备直接醇燃料电池管状阴极的方法，属于燃料电池领域。本发明首先配制凝胶注模用单体溶液，之后将中间相沥青炭微球加入到单体溶液中，搅拌均匀得到稳定的浆料，然后将浆料浇注到模具中，保温至单体与交联剂完全反应，得到炭管素坯，将素坯烘干、真空烧结后，在其表面采用浸渍工艺制备扩散层、催化剂层，然后采用滴管涂覆聚合物电解质膜，在加热台上对炭管进行滚压，使电解质膜固化。

A self-made vacuum melting and argon shield continuous unidirectional solidification equipment was used to produce copper tube with continuous columnar structure.

采用自行研制的真空熔炼、氩气保护连续定向凝固设备制备出具有连续柱状晶组织的铜管铸坯，分析了铜管铸坯生产中熔体温度、连铸速度、冷却水量，结晶器等对其的影响。

The company's alloy products used in high-quality tungsten carbide alloy powder as raw materials, the world's leading production technology, advanced selection of bilateral pressure XDZY-16A automatically Press, XDZL dumping rotating tube feeder system, XDPW spray drying system Tablets of equipment, XDYT vacuum sintering dewaxing one furnace, precision control of temperature and pressure control equipment for fully automated operation, with more than climate control and ensure stability in the production process.

本公司生产的合金制品系采用优质的碳化钨合金粉末为原材料，采用世界领先的生产工艺，选用先进的XDZY-16A双侧压自动压机，XDZL倾旋筒制料机，XDPW喷雾干燥制粒设备，XDYT真空烧结脱蜡一体炉，精密控制设备温度和压力控制为全自动化操作，带多气氛控制，保证了生产工艺过程稳定。

This paper explored various aspects of the vacuum creation process in both the mixing chamber and the abrasive feed tube.

本文从理论和实验两方面对磨料输送管道及混合腔中的压力流态进行了探索。

Based on an experimental exploration, an analytical framework is presented to allow theoretical calculations of vacuum conditions in the abrasive feed tube.

建立在大量实验的基础上，提出了磨料输送管道中压力梯度的理论分析方法，为将来的应用奠定了理论基础。

During this process, a vacuum is generated in the chamber, and garnet abrasives and air are pulled into the chamber, through an abrasive feed tube, and mixes with this high speed stream of water.

此过程中，由于水射流的高速运动，在混合腔中产生了负压。在此负压作用下，从磨料罐输出的磨料与空气一起被吸入混合腔，并在水射流的加速作用下，经磨料喷嘴喷射出，形成磨料射流。

It specifically analyses the construction problems of bridge deep foundation ditch excavation in the section of earthquake liquefied soft soil area,puts forward the programs of vacuum light well precipitation, steel tube pile fender and the composition of them to solve the damages of sand-blast boil and landslide that easily happened in the construction.

详细分析了地震液化带软土地区桥梁深基坑开挖的施工问题，提出了真空轻型井点降水、钢管桩围堰和两者相结合的方案来解决施工过程中可能出现的喷砂冒水和滑坡等灾害，试验结果表明，用该方法进行深基坑开挖支护是十分有效的。

A new vacuum ultraviolet detector is described, its photocathode is a solar-blind, a proximity focus tube with less dispersion and image distortion is adopted, its read-out system has light-coupling and electricity-coupling, the light-coupling read-out system is simpler and responds in real time, the electricity-coupling read-out has high sensitivity and resolution as well as long detection distance.

详细介绍了一种新型响应波段为105nm～300nm的真空型紫外成像探测器，其光电阴极具有&日盲性&，管型采用近贴聚焦结构，从而使得弥散和像差得以减小。探测器读出系统有光耦合读出和电耦合读出2种读出方法：光耦合读出系统能实时响应；电耦合读出灵敏度高，分辨力强，探测距离远。

Generally, the multiple - effect vacuum evaporating process is adopted and heat - exchanging equipments are mainly shell and tube exchangers, and stage I always adopts 0.6 MPa new steam as heat source.

在氧化铝的生产过程中，需要保持系统的水平衡和盐平衡，一般采用多效真空蒸发的生产工艺，换热设备大都采用列管式换热器，I效多采用0.6MPa的新蒸汽作为热源。

It shows that the flow resistance force of tube bundle has obvious effects on the vacuum and pressure drop of condenser, and also has a little effect on the shell side heat transfer coefficient.

结果表明，管束阻力对凝汽器的真空和压降有较大影响，对凝汽器壳侧换热系数的分布也有一定影响。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。