| 摘要 |
<p>The present invention relates to a fresh-air blower for automobiles having on a body (1) a ring gear (6) serving for rolling thereon toothed wheels (10) of rotary plates (9), a fixed grating (4) with conical holes (13), and a movable grating (11) with conical holes (12) sliding on said fixed grating (4).</p> |
