This brush holder of technology and structure has obsolete technology, lack of support structure is complex and the friction coefficient.
这种刷握的技术和结构己陈旧过时，技术中的不足是支架结构复杂摩擦系数大。
This brush holder of technology and structure has obsolete technology, lack of support structure is complex and the friction coefficient.
这种刷握的技术和结构己陈旧过时，技术中的不足是支架结构复杂摩擦系数大。
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