真空启动 meaning in English
priming by vacuum
vacuum start
Examples
- Most in - circuit test fixtures use spring - loaded probes and are vacuum actuated
很多在线测试固定装置是带有弹簧的探针或者采用真空启动的。 - Before steam admission , valve on vacuum hogging extraction line （ the valve is befor hogging pipe of the two stage steam jet ejector ） should be closed ( see also two stages steam jet ejector installation and operation instruction )
在蒸汽进入之前，抽真空启动管道上的阀门(启动抽汽器前的阀门)应该关闭（请参见相应的两级射汽抽气器安装使用说明书） 。 - According to the experimental parameters of mpt , the main performance parameters of different propellants have been given by engineering performance computation under designed and working states , which has great importance for the experimental research and the future work . 2 . for helium and argon , the factors which influence on mpt ' s vacuum steady work have been discussed such as the material of microwave tie - in , the distance between the probe and inner - conductor , the position of the inner - conductor , the input power of microwave , the mass flowrate of propellant and the vacuum pressure of environment , and the influence has been discussed of the microwave power and the mass flowrate of propellant on the pressure of the resonance cavity , thrust , reflected power and the temperature of the resonance cavity
论文的工作和新见解主要包括： 1在设计状态和工作状态下，根据mpt的实验参数，对mpt使用不同工质时的性能进行了工程估算，这对mpt现阶段的实验研究和今后的研究有重要的指导意义； 2对于he 、 ar推进工质，讨论微波的接头材料、探针与内导体的间隙、内导体的位置、微波的输入功率、工质的质量流量以及环境真空度对mpt真空启动和稳定工作的影响，并探讨微波的输入功率、工质的质量流量对谐振腔压强、推力、反射功率以及谐振腔温度的影响； 3对于n _ 2 、 h _ 2 、 nh _ 3 、 h _ 2o推进工质，主要讨论与he 、 ar工质不同的特性，并从长远的眼光和工程应用的角度，认为其可行性不容置疑，潜在优势不可忽略，是未来mpt应用的主流推进工质。