| 摘要 |
A hydraulic device includes a rotatable drum, at least one piston, a transition arm, and at least one compensating piston. The rotatable drum defines a cylinder that houses the piston. The transition arm is coupled to the piston to translate between linear motion of the piston and rotation of the rotatable drum. The compensating piston is in fluidic communication with the cylinder and is configured to counteract a force caused by an inlet or an output pressure during operation.
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