circular-milling machine
121Notching — For Nocking, the fitting of an arrow to a bowstring, see Archery. Notching is a metal cutting process used on sheetmetal or thin barstock, sometimes on angle sections or tube. A shearing or punching process is used in a press, so as to cut… …
122United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
123Western use of the Swastika in the early 20th century — adopted the symbol in the 1920s, it continued in use in Western countries with its original meaning until the Nazi association became dominant in the 1930s. The term swastika is first attested in English in 1871, and first refers to the Nazi… …
12411th century — As a means of recording the passage of time, the 11th century is the period from 1001 to 1100 in accordance with the Julian calendar in the Christian/Common Era. In the history of European culture, this period is considered the early part of the… …
125Coins of the pound sterling — The Royal Shield reverse designs, introduced in 2008 (£2 coin is not shown) …
126History of theatre — Performer playing Sugriva in the Koodiyattam form o …
127Kinetoscope — The Kinetoscope is an early motion picture exhibition device. Though not a movie projector it was designed for films to be viewed individually through the window of a cabinet housing its components the Kinetoscope introduced the basic approach… …
128Screw thread — Internal and external threads illustrated using a common nut and bolt. The screw and nut pair can be used to convert torque into linear force. As the screw (or bolt) is rotated, the screw moves along its axis through the fixed nut, or the non… …
