Steel tube is widely used as a sort of metallic material in oil, metallurgy, automobile, watercraft, electric plant, war industry and so on.It is important to the national economic development.

• 钢管是一种多功能的钢材,其用途覆盖了石油、冶金、煤炭、汽车、船舶、电站以及军工等行业,为国家经济建设和国防安全做出了巨大的贡献。