Part One: Orbital Weldingwelding and tube to tube welding .a) Tube to tube-sheet welding : 1. 408 welding power source of 400A; 2. Head of TP040 without wire feeding, TP060 with wire feeding; 3. positioner has two types: manipulate and balancer b) tube to tube welding : 1. Two types power source of EWA 408 (400 A) and DOVE 203 (200A)2. Open series head and closed series head3. A special head of Autocar big diameter tube to tube welding headPart Two: mechanized automatic welding system For mechanized automatic welding system cover sheet-to-sheet/longitudinal mechanized welding series, mechanized circumferential welding system, accessories (cutting machine, positioner, rolling bed, manipulator)Part three: welding robotic system integration Part four: Power source digital inverter MIG welding power source,Power source digital inverter TIG welding power sourceWe are looking forward to your reply.michelleli1028atgmail.com