Exhaust Gas Cleaning System (EGCS) Market By Product Types (Open Loop Exhaust Gas Purification System, Closed Loop Exhaust Gas Purification System, Mixed Waste Gas Purification System), By Applications (Oil & Gas, Steel Processing, Pharmaceuticals, Fertilizer Manufacturing, Textile Processing, Others) And By Region - Global And Regional Industry Overview, Market Intelligence, Comprehensive Analysis, Historical Data, And Forecasts 2023 - 2030