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内容来自Android手机客户端
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yexingyang:前叉腕组锁紧后,头管和前叉上管都是靠螺丝锁紧受力,里面不管是螺帽,还是花心,其实是不什么受力的吧 (2017-12-24 18:44)
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liuboyu:焊接的成本低工序少 (2017-12-24 20:35)
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