| 摘要 |
The moving carrier which sticks to the surface is provided with easy transverse movements on the surface. The moving carrier has at least two sets of driving wheels or one set of caterpillar on each of its right and the left sides relative to its traveling direction. One of the driving wheels is situated in the vicinity of the center of the sticking force; and another of the driving wheels is situated away from the center of the sticking force. The moving carrier can pivot at contact area as the pivot axis; at the contact area, one of the driving wheels situated in the vicinity of the center of the sticking force is contacted with the surface; and one of the moving units is driven and another moving units is not driven.
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