The aim and the method of mass spectrum analysis for residual gas and the differential pumping system, meanwhile, are introduced.
介绍进行残气质谱分析的目的,方法和采用的差分抽气质谱分析系统; 给出装置调试过程中常温和低温状态下残气谱图;
The production pressure differential can be increased and the injection-production ratio can be reduced by transferring from flowing to pumping.
利用自喷转抽提液方法,放大生产压差,降低注采比。
One-dimensional general model of land subsidence due to pumping is deduced and a semi-analytical method is used to solve this deviatoric differential equation.
推导了以垂向有效应力为基本变量的一维地面沉降的普遍模型,并用半解析方法予以求解。
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