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B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
B63H—MARINE PROPULSION OR STEERING
B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
B63H25/06—Steering by rudders
B63H25/38—Rudders
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Ocean & Marine Engineering
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FR678598D1928-11-071928-11-07Perfectionnement apporté aux gouvernails des navires
ExpiredFR678598A
(fr)