| 摘要 |
A device including a first hydraulic piston (206), a second hydraulic piston (202) disposed within the first hydraulic piston, and a third hydraulic piston (204) disposed within both the first hydraulic piston and the second hydraulic piston. The first, second, and third hydraulic pistons are contained within a common outer wall (214). A manifold (210,212,215) is connected to the first, second, and third hydraulic pistons. The manifold is disposed relative to the first, second, and third hydraulic pistons such that a fluid moving in the manifold can control positions of the first, second, and third hydraulic pistons. |
