hardened case depth
51Burnishing (metalworking) — Burnishing is the plastic deformation of a surface due to sliding contact with another object. Visually, burnishing smears the texture of a rough surface and makes it shinier. Burnishing may occur on any sliding surface if the contact stress… …
52volcano — /vol kay noh/, n., pl. volcanoes, volcanos. 1. a vent in the earth s crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. 2. a mountain or hill, usually having a cuplike crater at the summit,… …
53Christianity — /kris chee an i tee/, n., pl. Christianities. 1. the Christian religion, including the Catholic, Protestant, and Eastern Orthodox churches. 2. Christian beliefs or practices; Christian quality or character: Christianity mixed with pagan elements; …
54performing 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 …
55Das Boot — This article is about the Wolfgang Petersen film. For other uses, see Das Boot (disambiguation). Das Boot Original 1981 theatrical poster Directed by W …
56Tank — For other uses, see Tank (disambiguation). Tank A former British Arm …
57Geology of the Falkland Islands — The geology of the Falkland Islands has its origins in events of more than 400 million years bp, before the Falkland Islands existed as separate entities, with the appearance of intruded dikes in the crust of the supercontinent Gondwana. The… …
58List of Pokémon (201-220) — At the core of the multi billion dollarcite web|url=http://sev.prnewswire.com/entertainment/20051004/LATU06404102005 1.html|title=Pokémon Franchise Approaches 150 Million Games Sold|publisher=PR Newswire|accessdate=] Pokémon media franchise of… …
59military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
60Nuclear winter — For other uses, see Nuclear winter (disambiguation). Nuclear weapons History Warfare Arms race Design Testing …
