| 摘要 |
<p>The plate member is designed especially for use in the cleaning of carpets, or similar, has a fore plate (2) with a slope of between 4 deg. and 8 deg. and a rear plate (5) with a slope between 1 deg. and 5 deg. The intermediate surface (7) has a slope with a rise in the direction of motion of between 0.5 and 1 mm. Between the sloping surfaces are two aspiration channels (4, 8) each having a radius of curvature from 2.5 mm and 5 mm at the rear edges (10, 11) and having a radius of curvature from 0.3 mm to 1.5 mm at the front edges (13, 14). The slope of the rearmost channel (15) is between 40 deg. and 50 deg. relative to that of the rear plate (5).</p> |
