| 摘要 |
PROBLEM TO BE SOLVED: To prevent receding waves of a ship and to prevent the body of the ship from easily going aground a riffle. SOLUTION: A groove recessed in the upper direction from a starboard part 10 and a port part 20 to the center 100a of a bottom plate 100 is formed on the bottom of the ship from a bow to a stern. COPYRIGHT: (C)2003,JPO
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