已经有次观看 wencong在2013-08-01发布
简介：CCTV reporter to the national gold and silver products Quality Supervision and Inspection Center (Nanjing) sampling gold, gold purity of 99.99%, did not detect doping iridium and tungsten. Nanjing hospital quality gold and silver jewelry product testing that the State Minister Yang Pei place renowned testing agencies currently involved in the supervision and inspection of the amount of the gold market can be accounted for 80% to 90%, did not detect the gold doped tungsten and iridium.
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