本文对中压大功率电动机变频调速的技术特点和电路结构进行了分析，阐述了多电平变频器的工作原理。
The technical features of medium voltage high power inverter and the basic structure of its electric circuits are analyzed.
利用压电陶瓷技术，设计并制备整体式多阵列压力传感器，并用于爆炸冲击波压应力的测试。
Planar array and monoblock type pressure gauges were designed and prepared by piezoelectric ceramics, which were used to measure pressure of explosive blast successfully.
介绍了一种无飞边、多腔、圆截面橡胶密封圈压模的设计方法及制造技术，采用这种方法设计制造的模具结构简单、可靠，生产的产品质量良好。
The design technique and manufacture technology for a kind of multi-cavity, no-burr and round-section rubber sealing ring with multi-cavity and no-burr were introduced.
因此需要一种针对水平井多段裂缝的压后诊断技术来对施工效果进行分析评价。
Therefore, it needs a diagnostic technique for several hydraulic fractures in horizontal Wells after being fracturing, to analyze and evaluate the effect of fracturing.
本文阐述某型机研制中对这一新结构的多次试验过程，该材料成型时所需的热处理状态和多刀闸压工艺方法，生产出完全符合技术要求的零件。
This paper will discuss a method which can make a part coincide drawing requirement, it is a method including heat treat and several rolling combinations.
现场应用表明，双级梯度多凝水泥浆固井技术能减少施工压力，防止压漏地层；
The slurry has been used in field and the results showed that operating pressure was reduced and formation breakdown was prevented;
现场应用表明，双级梯度多凝水泥浆固井技术能减少施工压力，防止压漏地层；
The slurry has been used in field and the results showed that operating pressure was reduced and formation breakdown was prevented;
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