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| 31. | automatic firedamp detector |
| 自动沼气检定器 |
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| 32. | laser methanometer |
| 激光沼气测定仪 |
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| 33. | catalytic methanometer |
| 催化沼气测定仪 |
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| 34. | burrel gas detector |
| 少量沼气检定器 |
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| 35. | firedamp reforming process |
| 沼气重整法 |
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| 36. | methane carrier |
| 甲烷运输船沼气运输船 |
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| 37. | detector ,firedamp (i.e., methane) |
| 沼气（即甲烷）测定器 |
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| 38. | limit of flammability |
| 沼气成分燃烧极限 |
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| 39. | acoustic methanometer |
| 发声沼气检定仪 |
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| 40. | lower flammability limit of methane |
| 沼气成分燃烧下限 |
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