The basic types of gear transmission are external and internal cylindric gear drive, bevel gear drive, worm gear drive.
外啮合圆柱齿轮、内啮合圆柱齿轮、圆维齿轮和蜗轮蜗杆传动是齿轮传动的基本形式。
Output switch module is a low voltage PLC internal drive external signals into the switching signal output device and to achieve internal and external PLC electrical signal isolation.
开关量输出模块是将PLC内部低电压信号转换成驱动外部输出设备的开关信号，并实现PLC内外信号的电气隔离。
Activities in external life are a means to expressing an internal and unrelenting drive.
外部生活中的活动是一种反应出内在跟持续冲劲的方法。
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