| 摘要 |
A three section telescopic hydraulic ram features the ability to have its mid-section and interior or rod section independently actuated. Thus, the mid-section and rod section of the ram may be extended or retracted as a unit relative to the exterior base section, or the mid-section and rod section may move relative to each other in either direction while moving relative to the base section. This capability for individual control of the ram mid-section and rod section is achieved through a unique combination of fluid inlet porting and a divided piston construction for the interior or rod section of the ram.
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