Copper and copper alloys . provisions and procedures for the allocation of material numbers and registration of materials 铜和铜合金.材料登记和材料编号分配用条款与程序
Copper and copper alloys - provisions and procedures for the allocation of material numbers and registration of materials cr 12776 : 1997 铜和铜合金.材料号码的分配和材料登记的规定和程序