ppr pipe welding machine 1. Spec:For Dia20-160mm pipe 2.usage ... :Contains: standard sockets,screws,allen wrench,vice foot.The key technical indexes:•ambient temperature: -20°C-50°C.•RH ... suitable the specification of pipe and wrenching by the hex key wrench. Generally, small front, large in the post ... the red one turns off. It means that the machine has been on auto control condition, and can begin ...