It is the most common kind of control mode, is inexpensive structure simple, practical and convenient maintenance characteristic.
它是最常见的一种控制方式，具有价格低廉结构简单、实用、维修方便的特点。
Of structure that convenient for adjustment and maintenance, the electrical control system realized fault display, fault diagnose and fault elimination function.
在结构上便于调整和维护，在电气控制上实现了故障显示和识别以及故障排除方法提示。
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。
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