special purpose tools

例句：

1. 1.These special purpose tools are designed for specific tasks.
   这些专用工具是为特定任务设计的。
2. 2.The engineer used special purpose tools to make the machine work efficiently.
   工程师使用专用工具使机器高效运转。
3. 3.Special purpose tools are often used in construction and manufacturing industries.
   特种工具常用于建筑和制造业。