| 摘要 |
<p>In a fluid supply system having a servo-motor which when actuated assists the pistons of a plurality of independent amplifier cylinders to deliver working fluid to the respective outputs. Actuating means for the servo-motor are provided which actuate the servo-motor when the control fluid pressure in any one of the amplifier cylinders reaches a respective predetermined level, so that failure of one amplifier cylinder or one output does not impair the working of the servo-motor.</p> |
