1.  the transmission component - including motors, synchronous gear, rubber wheelassembly, etc.,it is used for transmitting engine to change the ratio.

2. Road wheel device: it is used for install specimen 14 pcs;

3. flow of sand, sand flow device - sand magazine, brackets and chute for storing and controlling slip abrasive sand, water slide.

4. the counterweight device - lever, counterweight and shields, etc., used to guarantee a predetermined pressure for road wheels,

5. specimen: it is used for stone material specimen