A surveying water pen of simple structure and convenient usage is made in our country that is applied in rice control and water saving irrigation for several years.
我国生产一种结构简单使用方便的测水笔，已在近几年水稻控制节水灌溉中应用。
The experiments prove that the molding system designed and developed for the castable polyurethane tire is with a reasonable structure, convenient molding operating and stable temperature control.
试验证明，该浇注轮胎成型系统结构合理、注射成型方便、 温度控制稳定。
Design a generating circuit of the wideband chaotic signals. The circuit has properties of the simple structure, easy implementation and convenient control.
设计了一种结构简单、易于实现、便于控制的宽带混沌信号产生电路。
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