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| 拉制无缝管 | |||
| 冷拔管; 无缝管; 拉制管 | |||
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draw pipe : 15 phrases in 8 subjects |
| Compressors | 1 |
| Drilling | 1 |
| Ecology | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 6 |
| Wind Energy | 1 |
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