Midsection of woman working at table
Man working on fire
Close-up of desk organizer on table
People making wedding ring on table in workshop
Close-up of illuminated lighting equipment
Scientist holding burning bunsen burner during experiment at laboratory
Close-up of person working on silver jewelery
Person working on fire
Worker holds top of water jug while filling it with drinking water.
Copper burning in a flame copper solution burning on a wooden splint in a bunsen burner flame.