覆盖在矿藏(如煤层)或其他地下构造上方的岩石和底土。
overburdens — plural of overburden
覆盖在矿藏(如煤层)或其他地下构造上方的岩石和底土。
The rock and subsoil that lies above a mineral deposit such as a coal seam, or any other underground feature.
位于被调查地层之上的无矿层。
A sterile stratum that lies above the stratum being investigated.
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