reflecting-block folding

例句：

1. 1. The engineer used a reflecting block to fold the metal sheet.
   工程师使用一个反射镜来折叠金属板。
2. 2.This reflecting block folding is perfect for creating a smooth surface.
   这种反射镜折叠非常适合创造一个光滑的表面。
3. 3. The reflecting block folding was designed to improve the accuracy of measurements.
   这个反射镜折叠被设计用来提高测量的准确性。