... welding pool, good quality. Good trust adjustment, anti sticking of welding rod, suited for all kinds’acid and alkaline welding ... , petrochemical, car, shipbuilding, boiler, nuclear electricity, space flight, war Industry,bridge building and outdoor working. ZX7-140 Power supply ... (W)50 Efficiency (%)85 Power factor0.93 Rank of insulationF Rank of protectionIP23 Weight (kg)7 Dimensions (mm)290×132 ...