perforated deflecting cap

例句：

1. 1.The engineer designed a perforated deflecting cap to improve the efficiency ofthe machine.
   工程师设计了一个穿孔偏转式帽盖，以提高机器的效率。
2. 2. The constructionworker used a perforated deflecting cap to protect his eyes from thedust.
   建筑工人使用一个穿孔偏转式帽盖来保护他的眼免受灰尘的伤害。
3. 3. The scientist tested the perforateddeflecting cap on a variety ofmaterials to determine its effectiveness.
   科学家对各种材料进行了穿孔偏转式帽盖测试，以确定其有效性。