1.It adopts Isuzu 4JB1 diesel engine (easy to assemble and disassemble), which is installed on the dedicated rolling shelf. 2.The slowdown rolling structure can rotate and lock the engine in any angle and position to enable students assemble and disassemble the engine. 3.A large oil drip pan is placed at the bottom for store small components and screws. 4.The rolling shelf is made in high-intensity steel and the surface is paint-coated. Self-retention wheels are installed to ensure that it is flexible and convenient.