General view of gold mines, mountains in the background. The sand washing machine is in operation. The master is behind the levers. Close-up - devices. Workers check the mechanisms. The washing machine is running, workers are watching it, water is spilling. An engineer stands at the dashboard. The vibrating sieve works: sand is sifted. A worker stands at a shaker; the conveyor belt delivers sand to the vibrating screen, the worker observes the process. The master mixes the sand using a special device. A tractor is driving; tractor driver in the cab.