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| 煤气表; 气体计数器 | |||
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| 气体计数器 | |||
| gas counter: 33 phrases in 8 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 8 |
| Geophysics | 1 |
| Oil / petroleum | 4 |
| Space | 2 |
| Technology | 15 |
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