parking brake knob 停放制动器按钮
parking secondary brake knob 停放紧急制动按钮
secondary parking brake knob 辅助停放制动器按钮
parking brake switch knob 停放制动器开关按钮
brake application knob 制动器操作把手
parking brake control knob 停放制动器控制按钮
parking brake valve control knob 停放制动器阀控制按钮
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