1:The PC Spun Pole/pile Welding machinery is for concrete pole/pile 2:full ... range from 6,7,8,9,12,15,16,30m,design according to your demand cage welding machine ... The welder is widely applied to reinforcement cage welding by self-stressing and prestressing pretensioning method and ... force at weld joint: ≥200kg16. Cooling mode of welding transformer: air cooling, self cooling17. Welder power supply: ...