| 摘要 |
<p>The grip has an assembly of elastic elongated blades (20) assembled in corolla from a lower fixing part (21) of the blades screwed through a screwing hole (22) on an external wall near an end of a conveying tube. An upper part i.e. return part (24), of the blades is oblong trapezoidal and bent with the lower fixing part, where 6 to 8 identical blades from the elongated blades are distributed regularly on circumference of the tube. A bend of the blade located on a folding (23) of the blades includes a slope ranging between 5 and 10 degrees.</p> |
