someone demonstrates about the small motor uses to the video
someone is holding an electronic device in their hands and explaining it
this person is showing what may be the aperture of a camera lens
machining head of an cnc or robotic machine for industrial purpose
a man holding a small black object in his hands
person standing and holding an instrument in hand and talking about it
a man is having some product in the hand and explain about it
a man is having some product in the hand and explain about it
man pointing out a shoulder piece on a specific mechanical casing unit
a man explains about a iron case and the shoulder that fits in the hole
a man describes the casing of a piece of machinery
a man is explaining the different options of a mechanical part
a man points to a a cilindrica object that he is holding that is black and silver
person is presenting the functions of the black product for camera
person is showing the part of engine and talking about it
a man holding an equipment machinery part in hand  explayning displaying on screen
a person is indicating a shoe hole of a part of a device
a male person is demonstrating and explaining a technical utensil
a man is displaying different gun parts and giving information about them
a person is showing some kind of small device