Robotic Welding Market Size, Share & COVID-19 Impact Analysis, By Type (Arc, Spot, MIG/TIG, Laser, Others), By Payload Capacity (Low (6-22 kg), Medium (30-60 kg), High (80-300kg)) By Industry (Automotive, Aerospace & Defense, Construction, Mining, Railway & Shipbuilding, Electrical & Electronics, Others) and Regional Forecast, 2021-2028