土壤钻 meaning in Chinese

drill of overburden
soil pencil

Soil drilling apparatus for drawing soil samples in agricultural engineering ; groove borers , tube borers
农业工程用土壤钻具.第1部分:槽形钻孔器和管形钻孔器
Soil drilling apparatur for drawing soil samples in agricultural engineering ; rod , rotating borers , sampling spoon , sampling spoon for marshes , twist drills
农业工程用土壤钻具.第2部分:钻杆旋转式钻孔器取