This Street Art Lives on Rotating Cement Trucks | Street art, Life art, Art design
Artist Benedetto Bufalino Unveils a Disco Ball Cement Truck — Colossal
File:Operation of a truck mixer.gif - Wikipedia
How a cement mixer mixes and pours concrete. Note that the gif shows a cross-section and the black thing is a corkscrew attatched to the walls of the mixers drum. : r/educationalgifs