短語詞組短語methane e content 沼氣含量methane -carbon content 甲烷碳含量occluded d methane content 吸畱沼氣量critical methane content 臨界甲烷含量adsorption methane content 吸附甲烷coalbed methane content 煤層氣含量methane content detail 沼氣含量methane content of bilogas 沼氣中甲烷含量occluded methane content 吸畱沼氣量 返回 methane content