Steel Floorboard Welder Instruction of Product:ZDN-300-A01-0002 Static ... technical function data of welder: 1. Specification of welding flat steel: thickness is 3mm-6mm, height is 20mm-65mm2. Space between ... flat steel: 30mm, 40mm, 60mm, 80mm and 100mm3. Board door: 400mm-1000mm4 ...