microboring head

例句：

1. 1.The microboring head is used to drill small holes in metal.
   微型钻孔头用于在金属中钻小孔。
2. 2.The engineer used a microboring head to make the hole perfectly round.
   工程师使用一个微型钻孔头使孔完美圆形。
3. 3. The microboring head was designed to be more precise and efficient than traditional drills.
   微型钻孔头的设计比传统钻头更精确、高效。