单词：roller pin
roller pin的用法和样例：
例句
- Needle roller bearing is a bearing.滚针轴承是轴承的一种。
- Combined needle roller bearings provide the means to produce locating bearing arrangements in a minimum of radial space.组合式滚针轴承在很小的径向空间里对固定端轴承配置进行定位。
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