non-magnetic drill collar

例句：

1. 1. The engineer used a non-magnetic drill collar to avoid damaging the delicate electronics.
   工程师使用了一个非磁性钻头套来避免损坏那些精密的电子设备。
2. 2. The drill collar was designed to fit snugly around the pipe without causing any interference with the flow of water.
   这个钻头套设计得紧紧套在管道上，不会对水流造成任何干扰。
3. 3. In order to prevent rusting, the drill collar must be made from a material that is both non-magnetic and corrosion-resistant.
   为了预防生锈，钻头套必须由一种既非磁性又具有抗腐蚀性的材料制成。