longitudinal welding
11Rail tracks — are used on railways (or railroads), which, together with railroad switches (or points), guide trains without the need for steering. Tracks consist of two parallel steel rails, which are laid upon sleepers (or cross ties) that are embedded in… …
12Track (rail transport) — Permanent way redirects here. For other uses, see Permanent way (disambiguation). Twin rail tracks in a wooded area …
13plasma — plasmatic /plaz mat ik/, plasmic, adj. /plaz meuh/, n. 1. Anat., Physiol. the liquid part of blood or lymph, as distinguished from the suspended elements. 2. Cell Biol. cytoplasm. 3. whey. 4. a green, faintly translucent chalcedony. 5. Physics. a …
14Boat building — Boat building, one of the oldest branches of engineering, is concerned with constructing the hulls of boats and, for sailboats, the masts, spars and rigging.Parts* Bow the front and generally sharp end of the hull. It is designed to reduce the… …
15Soldadura — Contenido 1 Historia 2 Procesos de soldadura 2.1 Soldadura por arco 2.2 Soldeo blando y fuerte 2.2.1 …
16ship construction — Introduction complex of activities concerned with the design and fabrication of all marine vehicles (ship). Ship construction today is a complicated compound of art and science. In the great days of sail, vessels were designed and… …
17North 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 …
18Nanowire — Part of a series of articles on Nanoelectronics Single molecule electronics …
19ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… …
20Churchill tank — Tank, Infantry, Mk IV (A22) Tank, Infantry Mk IV Churchill IV (75mm) Type Infantry tank Place of origin …
