contact overtravel 接点超程 ; [电] 触点超行程 ; 触点过调
overtravel switch 超程保护开关
armature overtravel 衔铁超程
armature pickup overtravel 衔铁吸合超行程
armature dropout overtravel 衔铁释放超行程
contact overtravel of relay 继电器触点超行程
brake cylinder overtravel switch 制动缸超程开关
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