lagging casing

例句：

1. 1. The new model has a lagging casing that makes it easier to use.
   这款新模型有一个滞后的外壳，使用起来更方便。
2. 2.The engineer used the lagging casing to protect the delicate electronics inside.
   工程师使用了滞后的外壳来保护里面的精密电子设备。
3. 3.The lagging casing made it difficult for the team to move around during testing.
   滞后的外壳让团队在测试期间难以移动。