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。
应用推荐