folding step

例句：

1. 1.The engineer used a folding step to make the design more efficient.
   工程师使用一个折叠步骤使设计更加高效。
2. 2. During the assembly process, the technicians followed a set of folding steps to ensure quality.
   在组装过程中，技术人员遵循一套折叠步骤以确保质量。
3. 3.The company has developed a new folding step that reduces waste and increases efficiency.
   该公司开发了一种新的折叠步骤，以减少浪费并提高效率。