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2. Knockout punch - Wikipedia

   en.wikipedia.org/wiki/Knockout_punch

   Chassis punches: assorted sizes round and square Chassis punches: assorted sizes round and square disassembled. In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw.

3. Greenlee - Wikipedia

   en.wikipedia.org/wiki/Greenlee

   Greenlee is an American industrial and electrical tool company headquartered in Rockford, Illinois.It was founded in 1862 by twin brothers Robert L. and Ralph S. Greenlee to manufacture their invention called a hollow chisel mortiser, consisting of a drill surrounded by four chisel blades used in making mortises (the hole) for mortise and tenon joints, for the furniture industry in Rockford. [1]

4. Category:30 mm artillery - Wikipedia

   en.wikipedia.org/wiki/Category:30_mm_artillery

   30 mm is a popular calibre for modern autocannons. Pages in category "30 mm artillery" The following 41 pages are in this category, out of 41 total.

5. 30mm DS30M Mark 2 Automated Small Calibre Gun - Wikipedia

   en.wikipedia.org/wiki/30mm_DS30M_Mark_2...

   The 30mm DS30M Mark 2 is a ship-protection system made by MSI-Defence Systems consisting of a 30mm Mark 44 Bushmaster II cannon on an automated mount. It was designed to defend Royal Navy frigates from fast inshore attack craft armed with short-range missiles, rocket-propelled grenades , machine guns , or explosives.

6. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.

7. Liver shot - Wikipedia

   en.wikipedia.org/wiki/Liver_shot

   A liver shot or liver punch is a punch, kick, or knee strike to the right side of the ribcage that damages the liver. Blunt force to the liver can be excruciatingly painful, but mostly lasts only about 30 seconds to one minute. An especially effective shot will incapacitate a person instantly. [1]