Global Delivery Robot Market Size study, by Load Carrying Capacity (Up to 10 Kg, 0.01-50.00 Kg, More Than 50 Kg) by Component (Hardware, Software) by Number of Wheels (3 wheels, 4 wheels, 6 wheels) by Speed limit (Upto 3 kph, 3 kph to 6 kph, Higher than 6 kph) by Industry (Retail, Food & Beverages, Healthcare, Postal, Others) and Regional Forecasts 2020-2027