由于操作环境差和运输负荷重等因素的影响，改向滚筒在使用过程中容易出现各种偏差，打滑问题和严重磨损。此时，许多用户将使用封装来减少磨损并扩展产品的使用范围。使用寿命长，换向鼓表面的防滑点蚀可提供2到3倍的牵引力，改善驱动器安装，节省能源和金钱;它可以消除皮带与滚筒之间的相对滑动，并有效减少皮带由于滑动摩擦而造成的损坏。

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