NC machine is used to ensure that longitudinal and circular weldings are produced at a constant speed and the welding point is always in flat position.

Used for welding the pole edge with the bottom flange for the telecom pole, street light pole.

Due to the large size of the deaerator water tank of a nuclear power station, in-situ welding is required for 2 ring butt welds, causing difficulties in welding and heat treatment.