pawl operating spring 棘爪操作弹簧
hand brake lever operating spring 手闸杆操作弹簧
knockout-operating spring 顶销动作簧
clock type operating spring 发条式复进簧
operating fork return spring 分离叉回位弹簧
operating valve spring 操作阀簧 ; 作用阀弹簧
Spring-return operating switch 自动复位的操作开关
yoke operating lever spring 离合操作杆簧
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