| 摘要 |
<p>An edge damper frame 18b is disposed in between a part of an outer peripheral surface 20a of a frame-cover 20 and a leveling surface 14c-1 of a frame 14. A slope 18e of a diaphragm 15 is extended from the edge damper frame 18b toward the frame 14 and provided alongside an outer side surface 14c-2 of a convex portion 14c of the frame 14.
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