| 摘要 |
The I.C. engine is used to drive hydraulically operated work tools, partic. on lorries. An inlet and outlet (14,14a) are provided for the tool hydraulic oil together with a return spring (38) for bringing back the piston (30) to an end position. To avoid an on-off effect, and ensure a satisfactory work process, components are incorporated (36,37,40-42) to regulate the movement speed of the piston (30) and/or its stroke length. |
