three-dimensional milling

例句：

1. 1. In the three-dimensional milling process, the machine tool moves in a plane that is perpendicular to the workpiece's surface.
   在三维铣削过程中，机床沿着与工件表面垂直的平面移动。
2. 2. The three-dimensional milling technology has greatly improved the precision and efficiency of the manufacturing process.
   三维铣削技术大大提高了制造过程的精度和效率。
3. 3. The engineer used a three-dimensional milling tool to create a complex design on the metal sheet.
   工程师使用三维铣削工具在金属板上创造出复杂的设计。