upper tension spring
... 压杆 ORESSURE ROD 上拉力弹簧 UPPER TENSION SPRING 带楔形支座的制动蹄 BRAKE SHOE WITH WEDGE SEAT ...
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不同类型的终端装在拉伸弹簧上提供拉力。
Various types of ends are used to attach the extension spring to the source of the force.
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