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ݦ . ا. . . . ݨ . CO2 . . .  2Mg+CO22MgO+C. . . X flash X . . ৵ . ͧ ف. .ߧ . ݧ HCHO+4[Ag NH3 2]OH= . . HCHO+4[AgNH3 2]OH=NH42CO3+4Ag+6NH3+2H2O. .

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