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| big inch pipe | |||
| large diameter pipe | |||
| big inch; trunk main | |||
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大直径管 : 20 phrases in 11 subjects |
| Agriculture | 1 |
| Construction | 1 |
| Drilling | 2 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Metallurgy | 2 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Technology | 8 |
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