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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. There are three different drive systems: manual, ratchet, and hydraulic. [2]
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]
Erector Set (trademark styled as "ERECTOR") was a brand of metal toy construction sets which were originally patented by Alfred Carlton Gilbert and first sold by his company, the Mysto Manufacturing Company of New Haven, Connecticut, in 1913.
Gene knockout by mutation is commonly carried out in bacteria. An early instance of the use of this technique in Escherichia coli was published in 1989 by Hamilton, et al. [2] In this experiment, two sequential recombinations were used to delete the gene.
The AHL and the ECHL do not use a set playoff format for their league championship playoff tournaments due to scheduling conflicts. For example, in the 2016 Calder Cup playoffs , due to scheduling conflicts in both arenas, the Pacific Division finals between the Ontario Reign and the San Diego Gulls used the "odd-even" playoff format, with ...
Karen Margaret Greenlee (born 1958) [1] is an American criminal who was convicted of stealing a hearse and having sex with the corpse it contained. She is considered as the "best-known modern practitioner of necrophilia", [2] [3] and her case was the subject of much research due to her sex as only ten percent of known necrophiles are women, [4] as well as because of the highly detailed ...