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20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called "guns", from larger-caliber "cannons" (e.g. machine gun vs. autocannon), is conventionally taken to be the 20 mm round, the smallest caliber of autocannon.
Ammunition was civilian market production, used commercial markings (headstamp over caliber), and came in commercial packaging with colored ink printing (marked "U.S. Property")..38 Super Auto was procured by the Office of Strategic Services in 1945 for use in Colt "Super .38" M1911A1 pistols. Remington Arms only made three contract lots (with ...
A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to inspect internal ...
Coupons are associated with Sunday circulars and help consumers who struggle to make ends meet. [19] A coupon is a discount, either of a certain specified amount or a percentage to the holder of a voucher, usually with certain terms. Commonly, there are restrictions as for other discounts, such as being valid only if a certain quantity is ...
The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I.It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II.
Some machine gun and autocannon cartridges (such as the MG 131 13mm and M61 Vulcan 20mm) utilize an internal electric primer that contains chemicals activated by an externally provided electric charge, as opposed to a mechanical impact. The primer in turn ignites the main propellant, just as with a shock-sensitive or external electric type.
Gang-run printing allows multiple jobs to share the setup cost. For example, a 28" x 40" sheet can hold 9 4" x 6" at 5,000 or 18 2,500 postcards (each card takes 4.25" x 6.25" on the sheet to accommodate full bleed. Gang-run printing has been one of the driving forces in the large drop in the price for full-color printing. [citation needed]
It is obtained by gradually applying load to a test coupon and measuring the deformation, from which the stress and strain can be determined (see tensile testing). These curves reveal many of the properties of a material , such as the Young's modulus , the yield strength and the ultimate tensile strength .