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| 51. | A biogas plant at the Muenchner Tierpark Hellabrunn will be fuelled by dung from elephants, rhinoceroses |
| 这家动物园已经在园内建好了一座沼气发电厂，而其所用的燃料则包括大象、牛、牛和羚羊等动物的粪便，以及任何动物吃剩的食物。 |
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| 52. | acoustic methanometer |
| 发声沼气检定仪 |
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| 53. | methane carrier |
| 甲烷运输船沼气运输船 |
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| 54. | MSA methanometer |
| MSA 型沼气检定仪 |
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| 55. | automatic firedamp detector |
| 自动沼气检定器 |
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| 56. | lower flammability limit of methane |
| 沼气成分燃烧下限 |
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| 57. | limit of flammability |
| 沼气成分燃烧极限 |
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| 58. | Must be some kind of methane buildup. |
| 应该是沼气集聚起来了. |
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| 59. | burrel gas detector |
| 少量沼气检定器 |
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| 60. | Hirschback method |
| 上部平巷排放沼气法 |
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