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| concentric pipe | |||
| concentric tube; concentrical tube | |||
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| concentric double pipe | |||
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同心管 : 58 phrases in 12 subjects |
| Agriculture | 4 |
| Aviation | 1 |
| Biotechnology | 1 |
| Chemistry | 1 |
| General | 3 |
| Life sciences | 1 |
| Mechanics | 6 |
| Metallurgy | 2 |
| Oil / petroleum | 16 |
| Oil and gas technology | 1 |
| Space | 2 |
| Technology | 20 |
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