vaneless-vaned diffuser

例句：

1. 1.The vaneless vaned diffuser is a popular choice for outdoor spaces.
   无叶风扇是户外空间的热门选择。
2. 2.The vaneless vaned diffuser provides a cool breeze in the summer.
   无叶风扇在夏天提供凉爽的微风。
3. 3. The vaneless vaned diffuser is designed to be energy efficient and environmentally friendly.
   无叶风扇设计为节能且环保。