1. The top of the compartment is closed and cannot be opened; 2. Optional front air intake grille and optional new cab; 3. Long overall size/wheelbase/front suspension/rear suspension: 11990/1900+4500+1300/1585 /2705, 11990/1900+4500+1350/1585/2655; 4. Optional refrigeration unit with equivalent power; 5. The connection method of the side and rear lower protective device is bolt connection, the material is Q235, and the rear protective ground height is 490mm, the cross-sectional dimension is 150mm×75mm.