Global Air Quality Monitoring Equipment Market By Type (Air Pollution Sampler , Anemometers , Gas Analyzers and Detectors , Particle Counter , and Nitrogen Oxides (NOX) , and Electrostatic Precipitators (ESP) Control Systems), By Application (Power Generation , Oil & Gas , Medical , and Construction), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029