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| 减压器 (焊接) | |||
| 调节器; 瓦斯调节器 | |||
| 煤气稳压阀; 气体调节器 | |||
| gas regulator: 17 phrases in 5 subjects |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Space | 3 |
| Technology | 9 |
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