This standard describes methods of light level control between an external locking type photocontrol.
本标准描述了外部锁定型光控器之间的光度控制方法。
The control motors are asynchronous, squirrel cage-type, closed, with external ventilation.
本泵型使用电机采用带外部通风装置的闭式异步电机。
The control motors are asynchronous, squirrel cage-type, closed, with external ventilation.
本泵型使用电机采用带外部通风装置的闭式异步电机。
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