Global Immersion Heater Market By Type (Immersion Heaters , Screw Plug Immersion Heaters , Flanged Immersion Heaters , Over-the Side Immersion Heaters , and Others), By Application (Chemical & Plastics Industry , Pharmaceutical Industry , Transportation , Appliances , and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029