Xiaonini71
bearing 选择适当的轴承材料是设计中要考虑的一个重要问题。Proper selection of bearing materials is an important design consideration
万达集团乔梦云
单向轴承 unilateral bearing单向推力轴承 single direction thrust bearingcircular unidirectional thrust bearing 环状单向推力轴承single thrust bearing 单向推力轴承,单向止推轴承
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