mine gas classification 矿井瓦斯等级
Classification of town gas 城市燃气分类
classification of coal gas 煤气分类
classification of natural gas 天然气分类
gas blanketing classification 气体分级
oil-gas reservoir classification 油气藏分类
Gas Tunnel Classification Assessment 瓦斯隧道分级评价
The impact on environment is acceptable analyzing in the methods of diffuse mode calculation, odour gas classification and monitor data, then some environmental protection Suggestions are put forward.
利用扩散模式计算、恶臭气体定级等方法，结合实际监测数据分析该工程对环境的影响在可接受范围内，并提出环保建议。
Principle of different detectors for gas safety detection and classification and selection of gas safety detection apparatus are expounded, and division of explosionproof area is discussed.
阐述了燃气安全检测的各种传感器工作原理、燃气安全检测仪器的分类和选择、防爆区域的划分。
Gas turbogenerator fault diagnosis can be treated as a pattern classification task.
燃气轮发电机组的故障诊断，实质上是一个模式分类问题。
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