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coarse vacuum
| pump
| coarse vacuum | |
| met. | 低真空 |
| pump | |
| environ. | 泵 |
| footwear | 高跟鞋 |
| hydroel.st. | 抽水机 |
| met. | 抽气机 |
| mining. | 泵抽 |
| tech. | 水泵; 泵 |
| |||
| 低真空 | |||
| 粗真空; 粗〔低〕真空 | |||
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coarse vacuum pump : 1 phrase in 1 subject |
| Chemistry | 1 |
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