| 摘要 |
The body (1) has mass weights (6) arranged about an axis of the body at regular angular intervals, where an axis of the mass weight is parallel to the axis of the body. Each mass weight is provided with a projection that is coaxially clamped in a hole of the body along the axis of the mass weight. Each mass weight is held by caulking deformation of a partial section of the projection and using a clamping ring 13. An inner annulus-like portion (3) is formed with tab-like portions 9 which extend from inside of an outer annulus-like portion (2). |
