| 摘要 |
An apparatus comprises first ( 3 ) and second ( 5 ) force-activated actuators, each having a fluid displacer ( 7, 9 ) and force control lever ( 19, 21 ) coupled to the fluid displacer, a conduit ( 15 ) for transporting fluid between the fluid displacers to couple motion of the fluid displacers, and a force controller ( 17 ) responsive to the pressure of the fluid for controlling a force opposing displacement of a fluid displacer.
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