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| 41. | automatic firedamp detector |
| 自动沼气检定器 |
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| 42. | laser methanometer |
| 激光沼气测定仪 |
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| 43. | catalytic methanometer |
| 催化沼气测定仪 |
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| 44. | lower flammability limit of methane |
| 沼气成分燃烧下限 |
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| 45. | firedamp reforming process |
| 沼气重整法 |
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| 46. | methane carrier |
| 甲烷运输船沼气运输船 |
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| 47. | detector ,firedamp (i.e., methane) |
| 沼气（即甲烷）测定器 |
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| 48. | limit of flammability |
| 沼气成分燃烧极限 |
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| 49. | acoustic methanometer |
| 发声沼气检定仪 |
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| 50. | settled sludge |
| 沉积淤泥 |
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