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R458A组成成分 摩尔百分比:R32占35.42%,R125占3%,R134a占54.09%,R227ea占7.14%,R236fa占0.35% 质量百分比:R32占20.5%,R125占4%,R134a占61.4%,R227ea占13.5%,R236fa占0.6%