중국강관, 강코일, 강판, 구리, PPGI, PPGL, 루팅 시트, H 빔 제조 / 공급 업체,제공 품질 ASTM A53 Galvanized Welded Seamless Steel Pipe Tube A36 A106 Mild Steel Profile Ms Rectangular Tube and Square Pipe, API 5L Sch 40/20#/16mn/ASTM A106/Galvanized/Painted/Oil and Gas/Boiler/Hot Rolled/High Pressure Seamless Steel Pipe, ASTM A36 A53 Grade B Q235 Hot Dipped Galvanized Steel Pipe with Threading and Coupling 등등.