短语词组短语copper pre -plating 预镀铜Copper -plating solution 镀铜药水copper -plating welding wire 渡铜焊丝cyanide copper - plating 氰化镀铜Immersion copper -plating 化学浸镀铜Rose -copper-plating 电红铜appearance of copper -plating 镀铜现象 返回 copper plating