permanent magnetic chuck

例句：

1. 1.The tool is designed to fit the magnets perfectly, ensuring a permanent magnetic chuck.
   这个工具设计得能完美地适配磁铁，确保永久磁性夹具。
2. 2. The engineer used a permanent magnetic chuck to hold the drill in place during the installation process.
   工程师使用一个永久磁性夹具来在安装过程中固定钻头。
3. 3. The machine uses a permanent magnetic chuck to lift heavy objects without damaging them.
   这台机器使用永久磁性夹具来举起重物而不损坏它们。