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| 皮带的支持轮; 张紧辊 | |||
| 导向带滚轮; 张紧轮 | |||
| 导〔辅，惰,支持〕轮; 皮带或链条的支持轮; 张力醌 | |||
| 导轮; 张力惰轮; 张力辊 | |||
| 支持轮; 滚轮; 导向轮; 导向滚轮; 辅轮 | |||
| jockey pulley: 1 phrase in 1 subject |
| Technology | 1 |
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