Global Urea-SCR System Market By Type (By Agent , Anhydrous Ammonia , Ammonia Solution , Urea Solution , By European Emission Standards , EURO 3 , EURO 4 , EURO 5 , EURO 6 , and Others), By Application (Power Plant , Cement Plant , Steel Plant , Glass Industry , Chemical Industry , Transportation , and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029