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.
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