The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.

屯留煤矿副井井筒段采用普通法施工,利用井外降水井疏干降水。

Effect of nutrient management on selected topsoil characteristics of a basalt derived Ferralsol in Dak lak ,Vietnam.

5 养分管理对达拉克(Daklak)一种玄武岩发育的铁铝性质的影响 Table 5.

In loessal regions and alluvial valley fills of the western United States, both surface soil and subsoil are commonly friable.

在美国西部黄区和冲积河谷里，和底一般是容易破碎的。