ShanDong HuaAn New Material Co.,Ltd.
phthalic anhydride
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maleic anhydride
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Pentafluoroethane
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1,1 Difluoroethane
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DIFLUOROETHANE
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1,1,1-Trifluoroethane
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1,1,1,2-Tetrafluoroethane
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