1) multistage acid fracturing
多级酸压
2) Multi-scale acidic
多级注入酸压-闭合酸化
3) multi stage decompression
多级降压
1.
Some problems concerning the design theories and optimization of multi stage decompression and micropore jet composite (MDMJC) mufflers are systematically analyzed.
对多级降压小孔喷注复合型消声器设计理论与优化方法中存在的问题进行了分析，介绍了为改善这些问题所做的一些探索工作。
4) multistage pressure
多级调压
1.
The multistage pressure control are presented for matching load change and expansion application range in the entrance throttle governing circuit.
分析了进口节流调速回路中溢流阀压力调定值与调速范围的关系 ,阐明了进口节流调速回路中溢流阀压力的正确调节方法 ,提出了用多级调压来适应负载变化和扩大进口节流调速回路的使用范围。
6) multilevel confining pressure
多级围压
1.
The research of rock triaxial compression with multilevel confining pressure and the data statistics;
岩石三轴多级围压加载试验方法与数据统计分析的研究
2.
Based on the servo-control triaxial testing machine,we can use a method of triaxial compression taking only one specimen or several specimens with multilevel confining pressure,and analyze the result of sandstone and mudstone.
作者在刚性伺服三轴试验机上通过简单的控制方式,采用单块或少量试件,实现多级围压作用下加载的三轴试验,并对砂岩、泥岩等试验结果进行了分析。
补充资料：冲击波超压与动压