1. However, the Japanese counterpart uses linear-inductive actuators instead of three hydraulic rams . 2. The machine works either by driving a screw or by hydraulic ram . 3. Lip-axis ladles may also use hydraulic rams to tilt the ladle. 4. Types of power take-off include : hydraulic ram , linear electrical generator. 5. Scenery was raised and lowered by hydraulic rams under the stage. 6. Motive power for the move was a series of hydraulic rams . 7. Three hydraulic rams work together, driven entirely by water pressure. 8. A large jacking frame containing hydraulic rams is required to produce these forces. 9. A variance on the Japanese version replaces the three hydraulic rams with linear-inductive actuators. 10. The lift was lowered by a hydraulic ram that was controlled from inside the vehicle.