To meet the directive of rejection of cyanide plating in China, chloride Zn-Fe alloy plating was presented to replace cyanide plating.

 
  • 為適應國家有關(guān)淘汰含氰電鍍的規定,提出以氯化物鋅鐵合金電鍍工藝替代含氰電鍍。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan