短语词组短语Seamless inner grooved copper tube 无缝内螺纹铜管Seamless copper -tube for cable 电缆用无缝铜管Seamless copper tube for heat -exchanger 热交换器用铜合金无缝管Seamless Copper -Nickel Pipe and Tube 无缝铜镍合金管 返回 seamless copper tube