| 摘要 |
<p>A vehicle for traversing a surface, for example for carrying out an inspection, survey or maintenance operation upon that surface, includes two or more bodies interconnected by structure for moving the bodies towards and away from each other, each of the bodies being supported upon a multiplicity of resilient bristles extending from it. By relative movement of the bodies, the vehicle is able to traverse the surface, which may be flat or curved, for example the internal or external surface of a tubular conduit such as a tunnel, shaft or pipe.</p> |
