| 摘要 |
The invention relates to an underwater machine 1 for laying pipelines 2 under water, which machine is provided with excavating devices of the chain type 4, 5 which are arranged in a V-shape when they are in their use position, each excavating device being provided with at least two chains 8, 9, 10; 8', 9', 10' which are positioned adjacent to one another and have different lengths so that corresponding chains of two excavating devices can wedge themselves in one another without contact with one another. Preferred embodiments are also described. <IMAGE>
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