The under water pipelines were laid into the stable bed by ditch burying of full cross-sectional area to ensure the safety of underwater pipelines.
水下穿越管线采用全断面沟埋敷设于河床稳定层内，确保了穿越管段的安全。
The under water pipelines were laid into the stable bed by ditch burying of full cross-sectional area to ensure the safety of underwater pipelines.
水下穿越管线采用全断面沟埋敷设于河床稳定层内，确保了穿越管段的安全。
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