What type of instrument is desert cooler ?
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/what-is-desert-cooler/matter-in-our-surroundings/1084242
https://www.meritnation.com/ask-answer/question/what-is-desert-cooler/matter-in-our-surroundings/1084242