towing pipe in floating 漂浮拖管
directional drilling and towing pipe 定向钻孔拉管
Pipe water towing 钢管下水拖带
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Relevant technical problems in pipe towing and sinking for the tunnel and the measures for solving the construction difficulties are introduced.
本文叙述了隧道管段在拖运、沉放过程中有关技术问题和对工程施工难点所采取的解决措施。
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