The band drawing mechanism is composed of a band clamping slide block and a band drawing feed screw connected with a loose pin at one end of the slide block.

抽带机构由一个夹带滑块和与滑块一端活销接的抽带丝杠组成。

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"It is possible that with an old, not properly maintained fifth wheel that the device can get loose, the sides can wear away, the hole that the pin fits into is no longer snug and rigid, " Scott said.

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