└牙条`````````````````````````````````````````````````
└垫圈`````````````````````````````````````````````````
└螺母
`````````````````````````````````````````````````
└螺栓`````````````````````````````````````````````````
└螺钉`````````````````````````````````````````````````
└其他紧固件
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