If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
A strain gauge (or strain gage) is a device used to measure strain on an object. Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern.he gauge is far more sensitive to strain in the vertical direction than in the horizontal direction.
Coil Thickness Coil gauge is the measurement of the thickness of the wire used to make a mattress coil. Gauge is a technical term commonly used to measure the thickness or diameter of something. From electrical wires, to shotgun shells, to mattress coils, the gauge is a measurement of the thickness of that component.