motor slide rails
... motor sleigh 雪橇 motor slide rails 电动机导轨 motor slip 感当电念头委婉好率 ...
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导轨直通到升降井顶部。钢丝绳在顶部绕过一个滑轮。滑轮由电动机驱动可向任一方向转动。
The rails pass up to the top of the shaft, where they are taken over a pulley which can be driven in either direction by an electric motor.
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模块上移
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