cutting edge normal plane
11Profile angle — The profile angle of a gear is the angle at a specified pitch point between a line tangent to a tooth surface and the line normal to the pitch surface (which is a radial line of a pitch circle). This definition is applicable to every type of gear …
12Glossary of woodworking terms — This page is a glossary of woodworking terms.AlphanumericTOC align=center nobreak= numbers= seealso= externallinks= references= top=|A* Applied carving background which is worked separately and then applied, rather than being worked in place.B*… …
13performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical. The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …
14Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …
15Countersink — A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common usage is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the… …
16technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
17Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
18Project On Government Oversight — Infobox Website name = [http://www.pogo.org/ Pogo.org] url = http://www.pogo.org type = Nonprofit Government Watchdog author = Dina Rasor owner = 501(c)(3) Non Profit OrganizationThe Project On Government Oversight (POGO), founded in 1981 by Dina …
19Trans World Airlines — TWA redirects here. For other uses, see TWA (disambiguation). Trans World Airlines IATA TW ICAO …
20List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
