1、
industry: metal doors; metal window; other doors; converter, switch; door hook;
所属行业：金属门；金属窗；其他门；转换器、切换器；门窗挂钩；；
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2、
Height of rotary hook and pump displacement are measured by proximity switch.
另外采用接近开关作为传感器来实现大钩高度和泵冲排量的测量.
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