1. Speed signal device of ZKZ-4 unit

2. SZF bi-directional water supply rotary valve

3. B302-2 automatic air supply

4. QZB ball valve type automatic air supply device

5. 3KH-V automatic air supply device

6. DPW-DYW Solenoid Pressure Distribution Valve

7. DCF23 Solenoid Air Valve

8. JZF Integrated Brake Valve Bank

9.  JQK2 Integrated Brake

10. ZBF22Q Small-bore Two-position Two-way Self-retaining Ball Valve