| 摘要 |
A control valve (13) for modulating the flow of a conventional oil- or water-based working liquid, comprises a valve member (2A, 2B) movable with respect to an orifice (19) through which the working fluid is adapted to flow, with the force on the valve member (2A, 2B), due to the pressure of the working liquid, being reduced by the provision of a fixed element (3, 5) on or in which the valve member (2A, 2B) is adapted to slide. |
