General spacifications for air door switching motion transducer in mine 矿用风门开闭状态传感器通用技术条件
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Door switches for automobiles 汽车车门开关
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Abstract : the method to realize rise and fall o f elevator and control of the door switch by a frequency converter was introduc ed 文摘:介绍了电梯改造中用一台变频器实现电梯升降及门开关控制的方法,以及电梯调试的一点体会