1. Air-service unit
6. 5/2-directional control valve,
    pneumatically operated
2. Single action cylinder
7. 5/2-directional control valve,
    electrically operated
3. Double action cylinder 8. Return orifice check valve
4. Rotary actuator
9. Quick exhaust valve
    (quick release valve)
5. 3/2-directional control valve,
    mechanically operated

10. Shuttle valve "OR" (selector valve) and
     twin-pressure valve "AND"