중국강관, 강코일, 강판, 구리, PPGI, PPGL, 루팅 시트, H 빔 제조 / 공급 업체,제공 품질 ERW Sch 40 80 Carbon Steel Steel Pipe Welded 6m 12mtube J55 K55 L80 N80 API Casing Pipes Seamless Steel Pipes for Oil and Gas Wells, GB/T 3091 Galvanized Pipes for Fluids Hot-DIP Galvanized Pipes, Low-Pressure Fluid Galvanized Steel Pipes for Structural Applications, Scaffolding Structures, Seamless Pipes and Tubes for Pressure Applications ASTM A106/A106m Gr. B St. 37.0 P355n P235gh Hot Rolling Pipe 등등.