It retains the metal etching this special surface processing practices have packaging decoration, eschewing the metal etching process of complex and high cost.

• 它保持了金属蚀刻这种不入格的暗不天增工伎俩所具有的包装点缀成果，又制止了金属蚀刻活命的工艺驳杂，本钱初等不敷。