| 摘要 |
PROBLEM TO BE SOLVED: To surely fit a pyramidal cap on the head. SOLUTION: The pyramidal cap made of a synthetic resin, in the form of a nearly regular quadrangular pyramid. A plurality of slits are formed on the inner circumferential edge of an engaging hole formed at the center of the bottom of the pyramid at a certain interval to integrally form foldable holding pieces. COPYRIGHT: (C)2003,JPO
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