| 摘要 |
<p>The nozzle (7) has an air outlet (11) arranged opposite to a flat portion (24) and extended in a plane (Px). An initial air passage zone (20) is provided with an initial section (Si), and a terminal air passage zone (23) is provided with a terminal section (Sn). The initial and terminal zones are perpendicular to the plane, and are spaced from one another by distance (D''), where ratio of the terminal section to the initial section ranges between 0.6 and 0.8 and the distance ranges between 0.23 and 0.33 times of width (L), that extends in the plane, of the air outlet.</p> |
