| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the identification of a hallmark such as quality display from the outside and to facilitate a design change. SOLUTION: A fixed small ring 7 is closely fitted to the annular part of a ring body 5, and the surface part of the fixed small ring 7 is engraved with a character, symbol, indicator or the like, or decorated. COPYRIGHT: (C)2003,JPO
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