parallel hole drilling

例句：

1. 1. This method is particularly useful for drilling parallel holes in metals.
   这种方法特别适用于金属中钻平行孔。
2. 2. The engineer used a special tool to drill parallel holes in the wall.
   工程师使用一种特殊的工具在墙上钻平行孔。
3. 3. In this case, the parallel hole drilling technique was crucial for achieving precision alignment.
   在这种情况下，平行孔钻探技术对于实现精确对齐至关重要。