VERTICALLY MOVABLE MARINE WORKING PLATFORM STRUCTURE HAVING VERTICALLY MOVABLE GROUNDABLE SUPPORT FRAMES
A vertically movable marine working platform structure is disclosed, which includes a working platform supported for vertical movement on parallel support frames individually comprising a plurality of parallel disposed vertical chords, each two adjacent chords being connected by a number of horizont...
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Format: | Patent |
Sprache: | eng ; fre |
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