bottom-hole rotation device
61Homopolar generator — A homopolar generator is a DC electrical generator comprising an electrically conductive disc rotating in a plane perpendicular to a uniform static magnetic field. A potential difference is created between the center of the disc and the rim, the… …
62Impact wrench — An impact wrench (also known as an air wrench, air gun, rattle gun, torque gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it… …
63Moot hill — A moot hill or mons placiti (statute hill)[1] is a hill or mound historically used as an assembly or meeting place. In early medieval Britain, such hills were used for moots , meetings of local people to settle local business. Among other things …
64Marshalsea — The prison occupied two locations, the first c. 1329–1811, and the second 1811–1842. The image above is of the first Marshalsea in the 18th century …
65List of British words not widely used in the United States — Differences between American and British English American English …
66International Space Station — ISS redirects here. For other uses, see ISS (disambiguation). International Space Station …
67Mir — This article is about the Soviet/Russian space station. For other uses, see Mir (disambiguation). Mir …
68Collimator — Example of a particle collimator A collimator is a device that narrows a beam of particles or waves. To narrow can mean either to cause the directions of motion to become more aligned in a specific direction (i.e., collimated or parallel) or to… …
69Auger — An auger is a device for moving material or liquid (see Archimedes screw) by means of a rotating helical flighting. The material is moved along the axis of rotation. For some uses the helical flighting is enclosed in a tube, for other uses the… …
70Urmuz — Demetru Dem. Demetrescu Buzău Urmuz, circa 1920, photographer unknown Born March 17, 1883 Curtea de Argeş Died November 23, 1923(1923 11 23 …
