Desc:Product DescriptionSeamless pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey...
Desc:Product DescriptionSeamless pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey...
Desc:Ventilation rectangular air metal duct machine manufacturers auto line 3 machine for saleAlibaba Production Line Bal-1500c Spiral Tube Forming Machine...