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| 41. | The explosive mixture of firedamp and air. |
| 甲烷和空气的爆炸混合物 |
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| 42. | methan explosive proportion |
| 沼气爆炸量 |
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| 43. | explosive range of methan |
| 沼气爆炸范围 |
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| 44. | methane carrier |
| 甲烷运输船沼气运输船 |
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| 45. | landfill gas venting trench |
| 沼气通风槽 |
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| 46. | catalytic methanometer |
| 催化沼气测定仪 |
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| 47. | fire damp detector |
| 沼气检定器 |
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| 48. | acoustic methanometer |
| 发声沼气检定仪 |
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| 49. | laser methanometer |
| 激光沼气测定仪 |
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| 50. | limit of flammability |
| 沼气成分燃烧极限 |
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