... which is Postposition B. Three grinding heads, a straight frame ,auto-cutter, Strip unfold shelf and finishing products shelf ... 40Cr,process: quenched and tempered, high-frequency, grinding, Chrome-plated. The Diameter of main axis: 40, Diameter of vertical ... Vertical mechanical, Q: grinding head, TH1: Straightening frame for round tube , TH2: Straightening frame for square tube. Welding Tube Machine