The selection and master design of guide drill tool are important problems usually met by field drilling operator and manufacturer.
导向钻具的选型与总体设计，是现场钻井工作者与制造厂家经常碰到的重要问题。
2
If a node in a type graph seems suspiciously large, you can double-click on it to drill down to the field layout view (Figure 23).
如果类型图中的一个节点看起来过大，您可双击它，向下访问到字段布局视图(如图23所示)。
3
In theory, the Army could use such a system to approach targets covertly and drill through concrete, steel, wood, or other materials from a stand-off distance equal to the length of a football field.