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Offshore dirlling drilling and production platform - comprises floating platform sliding on central pillar resting on sea bed
Offshore dirlling drilling and production platform - comprises floating platform sliding on central pillar resting on sea bed
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机译：海上钻井钻井和生产平台-包括在海床上搁置的中央支柱上滑动的浮动平台
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摘要
Offshore drilling and prodn. platform consists of a vertical pillar which is longer than the ambient water depth, and a floating platform capable of sliding along the pillar. The platform is constructed around the pillar, and the lower end of the pillar is supported on the sea bottom. The platform has a central hole concentric with the pillar but with a larger cross-section to facilitate sliding. The platform is connected to the pillar above water level.
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