| 摘要 |
There is disclosed an improved underwater excavation apparatus (300c,- 30Od; 30Oe; 30Of). The apparatus (300c; 30Od; 30Oe; 30Of) comprises at least one means (405c; 405d; 405e; 405f) for moving the underwater excavation apparatus (300c; 30Od; 30Oe; 30Of), the at least one moving means (405c; 405d; 405e; 405f) being provided on or adjacent to the apparatus. The at least one moving means (405c,- 405d; 405e; 405f) comprise means for orienting, positioning, rotating, counteracting reactive torque and/or steering the apparatus (300c,- 30Od; 30Oe; 30Of). The apparatus comprises a pair of horizontally opposed or symmetrically disposed inlets (371c; 371d; 371e; 37If) communicating with a single outlet (373c; 373d; 4373e,- 373f) the outlet (373c; 373d; 4373e; 373f) disposed vertically downwards. |
