Global Definite Purpose AC Contactors Market By Type (1-Pole Type , 2-Pole Type , 3-Pole Type , and 4-Pole Type), By Application (HVAC and Air Conditioning , Pump and Compressor , Elevators and Cranes , Heating and Lighting , and Food and Beverage), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029