Global Truck Refrigeration Unit Market Size, Trends, and Growth Opportunity, By Type (Split System And Roof Mount System), Length (< 8-Meter, 8-12-Meter, And >12-Meter), Power Capacity (5 Kw - 19 Kw, Below 5 Kw, And Above 19 Kw), Vehicle Type (Light Commercial Vehicles (LCV), Medium & Heavy Commercial Vehicles, Trailer (Container), Bus, And Others), Application (Chilled And Frozen), Power Source (Engine Powered And Independent) By Region and forecast till 2030