答：①先确认是空载还是启闭状态下产生的。②空载状态下产生，可检查固定杆件的螺钉是否
打太紧、是否打歪、是否有异物卡住传动部件、执手本身是否有问题。③启闭状态下产生，可
检查锁点调节是否处于初始位置，锁点与锁块是否配合过紧等。④检查后不是上述原因，请联
系本区域技术现场处理，再反馈总部技术部。
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