皮带是多槽的摩擦下一些粉末,小轮也是开槽的内有不少粉末可能牙刷清理,大轮是光滑的塑料上有黑槽印迹。因停机多日闻不到啥味。
皮带是多槽的摩擦下一些粉末,小轮也是开槽的内有不少粉末可能牙刷清理,大轮是光滑的塑料上有黑槽印迹。因停机多日闻不到啥味。
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