a man in white shirt is explaining something showing the board
a man is explain something drawing on the screen
there is a man is teaching someone with a drawing
there is a man talking in front of a drawings
there is a white shirt man is teaching with a drawings
a man is using a diagram to show the different components of a computer chip
a man staring at an abstract picture speaks about it
the man in the white shirt point at the board and talk
a man is pointing at multiple sections at a picture on the wall
a person explains a paper cutting which is pasted on the board
a man wearing white shirt pointing to a design on a board
the electronic circuit board model is described by a white dressed scientist diodes and transistors are connected in 2x2 inch board
a man talking of something about the drawing
a scientist talks about the features of a transistor he has designed
man describing a circuit and electricity in a circuit drawing
a man wearing a white shirt points to a diagram and talks about it
a man wearing a white shirt points to a drawing and talks about it
man in white shirt pointing to and explaning how to convert the image into a real object
a man is explaining how circuits work together
a man in a white shirt is pointing to and speaking about a picture of circuitry