| 摘要 |
PROBLEM TO BE SOLVED: To provide a surfboard including a surfboard main body provided with a speedmeter capable of measuring the speed in surfing by itself and capable of recording the speed and a numerical value thereof in surfing, in regard to a surfboard capable of measuring the speed in surfing by itself. SOLUTION: A user operating this surfboard with a speedmeter can know the speed and a record in surfing without measuring by using other measuring instruments and a manual means, and this surfboard with a speedmeter can display the speed and a record in a display of a measuring instrument provided on the surfboard. COPYRIGHT: (C)2009,JPO&INPIT
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