The device by the human operator launches, such as through the cone-shaped gear reducer drive, direct drive valve stem up and down movement of the valve gate.
本装置由人力操作手轮，通过锥形齿轮等减速传动，直接驱动阀门阀杆上下移动，启闭阀门。
Since the gear reducer is working with load, attention shall be paid to the temperature increase of axial cone bearing and sliding thrust bearing oil sump.
因为减速机此时已经是带负荷运转，所以应特别注意输入轴锥轴承的温升和滑动推力轴承油池的温升有无异常现象等。
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