| 摘要 |
PROBLEM TO BE SOLVED: To provide an air fan having high joining strength and concentricity, and easy in correcting a rotational balance. SOLUTION: A rotor yoke 1 and a rotor shaft 4 are inserted into a metal mold for molding an impeller 7, and these members are joined by integral molding. COPYRIGHT: (C)2007,JPO&INPIT
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