| 摘要 |
<P>PROBLEM TO BE SOLVED: To resolve unbalance of a resin fan with an annular portion without generating noise. <P>SOLUTION: A thickness adjustment part 4 for adjusting the thickness is integrally formed, in a part of the radial outside surface of the annular portion 3, along the surface with a uniform thickness. <P>COPYRIGHT: (C)2013,JPO&INPIT |
