| 摘要 |
PROBLEM TO BE SOLVED: To provide a washer for preventing sag which is constituted as a washer having excellent sag-prevention action. SOLUTION: Violent vibrations and impact are suitably absorbed because of an inner surface space 7 and hardening of a whole outer curved surface or the like of the conical oval washer 8. Then a fastening member can be securely fixed. COPYRIGHT: (C)2005,JPO&NCIPI
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