Seamless Steel Pipe, Steel Plate, Hot Rolled Steel Round Bar manufacturer / supplier in China, offering Tie Rod D25mm Thread Steel Bars for The Prestressing of Concrete 830MPa Psb830 Psb500 HRB400, Metallic Coal Mine Soft Rock Roadway Tunnel Support Rock Bolts Self Drilling Anchor Bolts Rods, Carbon Steel Alloy Steel Anchor Rock Supporting Bolts and so on.