| 摘要 |
An offshore platform including a deck with an aperture formed through it and a number of clamping means carried by the deck. The clamping means, which may comprise opposed doors, are mounted so as to be selectively movable between a retracted position, to leave the aperture freely open, and an extended position in which the clamping means extend into the aperture. The arrangement is to facilitate lowering and recovering heavy equipment such as a BOP stack.
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