deep penetration welding
31Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …
32North Carolina-class battleship — North Carolina steaming on 3 June 1946. By this time, many of the light anti aircraft weapons (Bofors 40 mm and Oerlikon 20 mm) mounted during the war had been removed, while more modern radars had been mounted on her forefunnel and mainmast …
33Case hardening — or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question …
34art conservation and restoration — Maintenance and preservation of works of art, their protection from future damage, deterioration, or neglect, and the repair or renovation of works that have deteriorated or been damaged. Research in art history has relied heavily on 20th and… …
35Alloy — This article is about the type of material. For the specification language, see Alloy (specification language). For lightweight auto wheels, see alloy wheel. Steel is a metal alloy whose major component is iron, with carbon content between 0.02%… …
36M1903 Springfield rifle — Infobox Weapon|is ranged=yes name= Rifle, Caliber .30, M1903 origin=flagcountry|United States type= Bolt action rifle designer= Springfield Armory design date= 1900 service= 1903–1957 users= See Users wars= World War I, World War II, Korean War,… …
37Caulking — is a process used to seal the seams in wooden boats or ships, and riveted iron or steel ships, in order to make them watertight. The same term also refers to the application of flexible sealing compounds to close up crevices in buildings against… …
38Ray Davis (U.S. Marine) — Infobox Military Person name= Raymond Gilbert Davis born= birth date|1915|1|13 died= Death date and age|2003|9|3|1915|1|13 placeofbirth= Fitzgerald, Georgia placeofdeath= Conyers, Georgia placeofburial= caption=Davis as Assistant Commandant in… …
