Door Panel Multi Head Spot Welding Machine 15 Heads The 20-head door panel multi spot welding machine welds all welding spots of the door panel at one time, delivering firm and consistent welding quality. The fully automatic cycle requires only one operator for loading and unloading, greatly reducing labor cost. Key Features - Firm Welding & Labor Cost Reduction 20 welding heads complete all spots at one time, firm and uniform weld nuggets One operator only for loading and