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| 起重滑车 | |||
| 单轮滑车 | |||
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| 吊货滑车 | |||
| 单轮滑车 | |||
| 单饼铁滑车; 差动滑车; 单滑轮 | |||
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gin-block : 1 phrase in 1 subject |
| Technology | 1 |
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