... overburden density 上覆岩层密度 overburden depth 覆盖深度 overburden equipment 剥土设备 ...
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large overburden depth 深覆盖层
depth of overburden 覆盖层深度 ; 负土深度
seam with low depth overburden 浅埋煤层
The reliability of seepage prevention system is a key problem for high rockfill dam built on the foundation of large overburden depth.
在深覆盖层地基上修建高土石坝，其防渗体系的可靠性是一项关键技术问题。
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