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| 汽动锤体〔撞头〕 | |||
| 汽动活塞式推钢机 | |||
| 直接作用蒸汽汽缸; 汽动撞头; 汽动推钢机; 汽动锤体 | |||
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steam ram : 1 phrase in 1 subject |
| Bridge construction | 1 |
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