Technical parameters: 1, welding skeleton side length: 250,300,350,400,450,500,600 mm and rectangular; 2, welded steel skeleton length: 4M-15M(can be customized according to user requirements); 3, the number of longitudinal ribs: 4,8,12, etc. (can be customized according to user requirements); 4, longitudinal bar diameter: 7.1, 9.0, 10.7, 12.6mm and rebar diameter 12-24mm; 5, ring diameter: diameter of 4-6mm; 6, drive power: 8.4KW~15.2KW; 7, welding power: 200KVA~300KVA; 8, control mode: microcomputer control.