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
Concrete mixer on Make a GIF
How To Make Really Good Concrete Or Mortar In A Cement Mixer -- In Three Minutes! on Make a GIF
Cement GIFs | Tenor
Remote Control for Cement Mixer Trucks | Tele Radio