straight-wall core shell

例句：

1. 1.The structure of the new building is straight-wall core shell.
   这座新建筑的结构是直壁核壳。
2. 2.The engineer designed a straight-wall core shell to increase efficiency.
   工程师设计了一个直壁核壳来提高效率。
3. 3. The company's latest product features a straight-wall core shell that reduces weight and improves durability.
   该公司的最新产品采用了直壁核壳设计，以减轻重量并提高耐用性。