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Ahoana no hanadiovana ny porcelain crucible?

Ahoana no hanadiovana ny porcelain crucible?

Azonao atao ny manandrana azy amin’ny lotion asidra chromic. Fomba fanasana lotion asidra chromic: lotion asidra chromic (100g potassium dichromate levona amin’ny asidra sulfuric 200ml), tandremo tsara ny fiarovana rehefa manomana, mikarakara azy, ary tadidio ny mitadidy.