| 摘要 |
<p>The carrier (1) has a frame with lower and upper parts (2,3) presenting a V-shape. The branches of the V-shapes converge to cross in a zone such that one branch passes over or under another branch. Height of V-shape of the upper part is equal to N times as that of the V-shape of the lower part, where N is predefined value. A lower end of the frame is equipped with a support device.</p> |
