Centrifugal Fan, Centrifugal Blower, Axial Fan manufacturer / supplier in China, offering Htfc-28" Ventilation Box Fan for Fire Control, Xfm-800 Backward Double Inlet Suit Fan, Dz-1120b Backward High Voltage Cabinet Fan and so on.
It is the last photo.
You have seen all photos.
fog cannons/Spray fan/air blast sprayer
used in quarry