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| 三通开关阀 | |||
| 三通阀 | |||
| 三通旋塞 | |||
| 三向液流开关 | |||
| 开关旋塞; 三向龙头; 三通塞门; 三通开关; 三通活栓; 三向闸门 | |||
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| 三通旋塞 | |||
| 三向龙头 | |||
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three-way cock : 7 phrases in 4 subjects |
| Chemistry | 1 |
| Compressors | 1 |
| Metallurgy | 2 |
| Technology | 3 |
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