GB/T 33817-2017铜及铜合金管材内表面碳含量的测定方法国家标准
英文:Method for determination of the carbon content on the inner surface of copper and copper-alloy tube GB/T 33817-2017介绍...
英文:Method for determination of the carbon content on the inner surface of copper and copper-alloy tube GB/T 33817-2017介绍...