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| 装在滑轨板上的举升器 | |||
| 旋转千斤顶; 横移式起重器; 横动千斤顶; 横式起重器; 滑座螺旋起重器 | |||
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| 横式螺旋起重器; 滑座螺旋起重器 | |||
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traversing jack : 2 phrases in 1 subject |
| Technology | 2 |
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