A man in a white lab coat is seen talking to the camera and showing various tools in a laboratory.
A man in a white lab coat is seen talking to the camera and showing various tools in a laboratory. towel
cleaning is shown by hand and a man works on an inner tube with various tools laid out for him. are seen sitting in a sink and the man shows the proper hand washing tools. cleans and with a violin played makes measurements of the instrument making instructions. scraping is seen on the floor in front of him as he continues to speak.