| 摘要 |
<p>This invention relates to dredgers for removing sand, silt and like material from the river or sea bed and has application, for example to clearing wrecks, and providing trenches in which, for example, pipelines may be laid. There is described a dredging apparatus comprising a body (11) mounting first thrust means (24, 74, 75) to direct, in use, a wash of water downwards towards an area of seabed or the like characterised in that the dredging apparatus includes further thrust means (44, 55, 58, 59, 77, 78) to maintain the body of the apparatus above the seabed and to propel the body through the water.</p> |
