| 摘要 |
A pipe laying vessel has a hoisting winch whose cable is connected to an underwater pipeline during abandonment and recovering operations by a shock absorbing device inserted into and connected to the free end of the pipeline. The shock absorbing device includes a pre-pressurized hydraulic accumulator which is hydraulically coupled to a cylinder and piston, the piston being connected to the hoisting cable with shock loading due to wave action on the vessel being converted to movement of the piston in the cylinder and against pressure of the accumulator.
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