Shenzhen Hualong Welding Cutting Equipments Co.,Ltd is the largest OEM manufacturer of inverter welding machine and plasma cutting machine in China,offering OEM service for more than 200 companies. HUALONG have 4 subsidiary factories:. HUALONG's subsidiary factory 1: Assembling factory, for assembling inverter welding machine and plasma cutting machine. HUALONG's subsidiary factory 2: Spare parts factory,specialized in high frequency transformer, Reactors,arc starter,connectors etc.supply ...