Definitions for "Vacuum Tube"
Electronic switching and amplifying system inside a glass tube. Pre-solid state. Requires huge amounts of power, generates beaucoup heat, takes up lots of space. Fails regularly. Over 2,000 of them in a Nike Set.
The connecting tube in a milking machine between a milk receiving bucket and the air pipeline. Valuation(a) The process of attributing value to a specific item for a specific reason. A number of alternative methods are possible.
Also known as "Vacuum Valves." It is an electron tube from where all air and gas has been evacuated. It was previously used in radio and electronics.
Keywords:  resistor, variable
a variable resistor
a device with a vacuum (very low pressure gas) filling
a very forgiving device
Keywords:  beautiful, fronts, object, two
a beautiful object on two fronts