短語詞組短語hexavalent chromium plating 六價鉻電鍍hexavalent chromium reducing bacterium 六價鉻還原菌hexavalent chromium resistance 六價鉻抗性determination of hexavalent chromium 測定六價鉻hexavalent chromium -contamination 鉻汙染hexavalent chromium ion 六價鉻離子hexavalent chromium reduction bacteria 六價鉻還原菌trivalent and hexavalent chromium 三價鉻和六價鉻hexavalent chromium electroplating 六價鉻電鍍 返回 hexavalent chromium