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| 残余气; 干气 | |||
| 残气; 尾气 | |||
| 残留的天然气 (石油中); 残余煤气; 残留气 | |||
| residue gas: 7 phrases in 3 subjects |
| Oil / petroleum | 3 |
| Oil processing plants | 3 |
| Technology | 1 |
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