钻孔方法 meaning in English

boring system
system of drilling

Influence of conditions of complex geologic structure on underwater drilling and its solution
复杂地质条件下水下钻孔方法
Abstract : it introduces the boring method under different geometric conditions and points to be noted in constructing foundation for piles of tieshan harbor bridge
文摘:介绍铁山港跨海大桥桩基础不同地质情况下的钻孔方法和注意的问题。