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NL8800415A
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Rudder propeller for the propulsion of a vessel.
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GB2014929A
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A vessel with tilting swivelling propeller and a swivelling propeller unit for such a vessel
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NL7900406A
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Tube encased propeller installation system - uses caisson placed over hull, control tube opening, and access hatch
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NL7900306A
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Propeller pitch regulation system - has control unit receiving signals representing rated and actual pitch and engine power
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NL7710276A
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Steering screw construction with retractable screw.
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NL7709304A
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Steerable ship screw with coaxial steering column and drive - includes shaft, and fork-ring linkage through column to indicate blade angle position
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