one direction thrust ball bearing 单向止推滚珠轴承 double-direction thrust ball bearing 双向推力球轴承 two-direction self-aligning ball thrust bearing 双球面止推滚珠轴承 ; 自调止推滚珠轴承 ; 双曲面止推球轴承 ..
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double direction thrust ball bearing 双向推力球轴承
double-row single-direction thrust ball bearing [机] 双排单向推力球轴承
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