Mix together with copper and other metals through handle but appear " have the copper of the spot " , use the spot made of copper become of the work article west the rob , enrich the special features very much 是用铜和其他金属混在一起经处理而出现“有斑之铜” ，用斑铜制成的工芤品西朴浑夺取，极富特色。
