vacuum pumping

Test of Cooling Cylinder by Vacuum Pumping out Air

真空抽吸空气冷却汽缸试验

This paper discusses the influence of beaming effect and worked out the accurate expression of the transmission probability of the next tube in vacuum pumping line.

本文计论了集束效应对后续管道的影响结果，以现有的计算公式为基础，导出了后续管道传输几率的较为精确的近似计算公式。

The original import vacuum pumps, vacuum pumping strong, no noise.

原装进口真空泵, 抽真空强劲, 无噪音.

The pump dose not pumping water, but the vacuum gauge shows high vacuum.

水泵不吸水, 真空表仍表示高度真空.

Abstract As influence of beaming effect, the entry conditions of the next tube in vacuum pumping line is different, from the tube which connects with a big vessel, so the transmission probability which was worked out by the experience approximate expression will lead to more errors.

由于集束效应的影响，真空管路中后续管道与入口连接大容积的管道的入口条件不相同，因而其传输几率的计算用现有的近似计算公式将会导致较大的误差。

Based on vacuum pumping accompanied with throttling process, presenting several superfluid helium cooling cycles and analyzing their flow principle and cooling characteristic.

以抽真空与节流相结合为基础，给出了几种超流氦冷却循环方式；

LS series wet roots vacuum pump is a rough vacuum pumping equipment.

LS型直排大气湿式罗茨真空泵属粗真空获得设备.

Modular Structure Design of the Vacuum-pumping, Removal of Humidity and Charge Nitrogen Equipment Which Is Applied in the QDX Series Refrigerator Compressor

QDX系列冰箱压缩机抽真空除湿充氮气装置的模块化结构设计

The final liquid ratio of superfluid helium by vacuum-pumping accompanied with throttling process is 90.3%, and the complexity and the cost of the equipment is similar to the vacuum pumping plan.

抽真空及抽真空与节流过程相结合的方案最终获得的超流氦液体率分别约为100%、90.3%。

Vacuum Pumping System for Cabin Pressure Regulator Dynamic State Test Stand

座舱压力调节器动态试验台真空抽气系统

Study on Strengthen of Mudflat by Combination of Vacuum pumping& Low Energy Heavy Tamper

真空降水和低能量强夯组合加固滩涂地基