Global Water Cooled Ozone Generator Market By Type (Low Frequency Ozone Generator, Medium Frequency Ozone Generator, and High Frequency Ozone Generator), By Application (Potable Water Treatment, Industrial Wastewater Treatment, Municipal Wastewater Treatment, Gas Disinfection, and Other), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028