It's PVC Win-door 3-head Welding Machine for Windows and Door.
The machine can be used for welding ofplastic doors and windows, it can weld ┏┏┓┏┳┓┏┳┳┳┳┳┳┳╋ and their combination. This machine adoptsthe program control pneumatic rotation, high reliability, wide processing range,three heads can work alone, also can work simultaneously or linkage.