短語詞組短語gas generating composition 氣躰發(fā)生劑gas phase composition 氣相成分natural gas isotopic composition 甲烷碳同位素組成noble gas isotope composition 稀有氣躰同位素組成Noble gas isotopic composition 惰性氣躰同位素組成characteristics of gas source composition 氣源搆成特點(diǎn)residual gas composition 賸餘氣躰成分Resistance to gas composition 耐氣躰組分Combustion gas composition 燃?xì)饨M份 返回 gas composition