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| 61. | Operation rules of construction and nstallation of biogas pipelines for peasant household |
| GB/T7637-1987农村家用沼气管路施工安装操作规程 |
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| 62. | Depending on the waste feedstock and the system design, biogas is typically 55% to 75% pure methane. |
| 视垃圾原料和系统设计而定，沼气通常含有55%至75%的纯沼气。 |
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| 63. | Methane is the second most important greenhouse gas after carbon dioxide, and rice fields are among the biggest sources of methane. |
| 沼气是仅次于二氧化碳的第2重要的温室气体，稻田是沼气的最大来源。 |
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| 64. | Domestic hot water is provided mainly by a heat pump using exhaust air from the composting toilet. |
| 家庭生活热水主要由以沼气为燃料的热泵提供的，沼气是由带发酵装置的厕所产生的。 |
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| 65. | Standard on design of biogas pipelines for peasant household |
| GB/T7636-1987农村家用沼气管路设计规范 |
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| 66. | You obviously don't know anything about methane deposits. |
| 你不是也不知道这有沼气聚集吗. |
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| 67. | Ringrose pocket methanometer |
| 里因罗斯袖珍沼气检定仪 |
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| 68. | landfill gas hazard assessment |
| 沼气危险评估；堆填区气体风险评估 |
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| 69. | Those mines have the highest concentration of methane gas. |
| 那些矿井全都充满着高密度的沼气 |
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| 70. | The biogas system is the kernel component of Guquan Experimental Farm of Ecological Engineering. |
| 沼气系统是古泉生态实验场的核心部分。 |
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