| 摘要 |
FIELD: pipeline engineering. ^ SUBSTANCE: method comprises trenching to define trench widenings symmetrically with respect to the pipeline, laying the pipeline, overlapping the pipeline and trench bottom with flexible mats at the sites of widenings, and filling the trench and pits for permitting the flexible mats to be pressed to the bottoms of the pits and the trench. ^ EFFECT: enhanced reliability. ^ 21 cl, 4 dwg |
