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| 钢导管 | |||
| 钢阴沟; 钢管; 布线钢管 | |||
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steel conduit : 15 phrases in 5 subjects |
| Aviation | 1 |
| Business | 1 |
| Hydroelectric power stations | 1 |
| Technology | 10 |
| Wind Energy | 2 |
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