| 摘要 |
PROBLEM TO BE SOLVED: To provide a compression ring having high mechanical strength for uniform tightening without decreasing bearing in tightening. SOLUTION: Grooves 4 continuous in a bus direction is circumferentially and uniformly formed at a plurality of portions of an inner circumferential face 3 of a metal ring member 2. COPYRIGHT: (C)2005,JPO&NCIPI
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