工作表面还可以根据需要钻孔镶嵌固体润滑剂，进一步改进摩擦特性。
地基和地下水.土壤和岩石的名称和说明.岩石钻孔的地层目录
1·It is this water, called ground water, which is found in Wells, in borings, and in springs.
这种水就叫做地下水，在水井、钻孔和喷泉里都能见到。
2·The holes are only borings, less than a foot in diameter.
这些洞只不过是一些钻孔，直径不到1英尺。
1·Based on thermodynamics principle, the feasibility for melting iron borings in cupola was ana lysed.
从热力学角度分析了在冲天炉内熔炼铸铁切屑的可行性。