Global Metal Shell and Tube Heat Exchanger Market By Type (Fixed Type , Floating Head Type , U-tube Type , and Other Types), By Application (Petrochemical , Electric Power & Metallurgy , Shipbuilding Industry , Mechanical Industry , Central Heating , Food Industry , and Other Applications), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029