This machine is used for fire extinguisher bottle nozzle Angle circular seam welding with vertical welding structure. (web: www-dot-jinanjili-dot-com, email:jilimachine-at-gmail-dot-com) Welding torch is driven by motor return to the welding starting point after finish the setting welding length. PLC is the control core of Electronic control system, which could control the welding action accurately, improve the welding quality and welding efficiency, reliable, low failure rate and convenient adjustment.