a doctor explaining what the machine is about
a few lab workers are showing off some equipment
a few male scientists talk about an experiment they are undertaking
a man is explaining the voltage on a screen
a man playing video games
a scientist explains what is shown on a screen
a scientist is demonstrating a machine
doctors discussing about the e
man explaining machines in a laboratory
men showing some mechanical experiments
people are doing experiments in the lab
people explaining an electronic device
scientists explain voltages they use
scientists talking about a machine
someone showing you a machine with a graph on the screen
the men in the lab are working on the equipment
two men in lab coats talking in front of a computer and pointing at a machine
scientists talking about a machine
a few male scientists talk about an experiment they are undertaking
scientists explain voltages they use