| 摘要 |
<p>A front spinning rake top (8) fits on one side of a pole-shaped longitudinal spar (21) and the remaining spinning rake tops (6,7) fit on the other side of this spar. A bogey (4) lies in a direction of movement underneath an imaginary rectangular triangle (28) with corner points (A-C). Its surface is enclosed by a hypotenuse (31) and a catheti (29,30). The hypotenuse runs through the axles of the spinning rake tops.</p> |
