表土

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

屯留煤矿副井井筒表土段采用普通法施工,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.

表5 养分达拉克(Daklak)一种玄武岩发育的铁铝土基本表土层性质的影响 Table 5.

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

在美国西部黄土区河谷里，表土底土一般是容易破碎的。