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NL1010112C2
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System for operating a vessel.
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NL8800526A
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Flow conductive surfaces for a ship.
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NL8204298A
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Jet tube for a vessel screw.
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NL8000685A
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Variable-pitch ships screw - has hub housing with blade-adjusting pistons axially slidable on shaft contg. medium ducts fixed in housing
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GB1600994A
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Ship propellor ducts
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ES439390A1
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Marine helmet of adjustable passage with orientable blades (Machine-translation by Google Translate, not legally binding)
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GB1478674A
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Feathering controllable pitch propeller
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