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%。

Study on the Removing of NH_3-N in Landfill Leachate by Vacuum-pumping

真空 抽吸 法脱除垃圾渗滤液中氨氮的研究

The utility model relates to the field of gas compression liquid transportation and vacuum-pumping in particular to a rotary compression machine with a translatory piston .

本实用新型涉及在气体压缩、流体输送和 抽 真空领域，尤其涉及一种具有平动活塞的旋转压缩机械。

Under two process conditions viz . a part of the product gas used as the regenerating gas and regeneration with vacuum-pumping the stability of the purification process by removal of CO from the ammonia feed gas is examined .

在部分产品气体作为再生气和 抽 真空再生2种工艺条件下，考察了合成氨原料气中CO的净化过程的稳定性。

Epoxy are heated to pull down its mucosity and three times of vacuum-pumping are conducted to eliminate the air bubble in epoxy before and after adding nano powder .

对环氧树脂进行 预加热以降低其粘稠性，在加入纳米粉体前后进行三次 真空 脱泡 操作。

Cyclic load was exerted on the glass fiber reinforced plastic ( GFRP ) sample that was composed of adhesively bonded tubular joint by MTS 810 material test system . Vacuum of sample was measured using dynamic vacuum-pumping method .

用MTS810材料试验机对玻璃钢管状粘接试样施加循环载荷，并用动态 真空法测量试样真空度的 变化。

The result is the systems operation is normal and the control-valve can also achieve the anticipated design effect . Through comparing different curve obtained from injector vacuum-pumping experiment the topic obtained the primary factor influencing injector pumping vacuum and confirms the theory simulation result .

系统运行正常，控制阀也能达到预期的设计效果；通过比较系统运行时不同通径下泵腔 真空 度 的 变化曲线，分析得出影响射流泵抽真空的主要因素，也验证理论仿真研究结果。

Three-grades vacuum-pumping system with supercharger has been adopted .

抽 真空系统采用带增压器的三级抽 真空系统等。

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