Global High Pressure Discharge 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, and Gas Disinfection), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028