Mainly used for: furnace cellars, boilers, various pipelines, mechanical equipment with a plate thickness of ≥ 3mm (M3mm) -32mm (M34mm) screws, bolts, shaped nails, corrugated nails, pins, insulation nails, anchor welding, small volume, light weight, energy-saving and environmental protection, especially suitable for export and foreign trade (saving transportation costs of over 10000 yuan), suitable for generator power supply (saving30%-40%)