corrosion penetration rate
51MÉCANIQUES (FABRICATIONS) — On entend par fabrications mécaniques la mise en œuvre de tous procédés ou moyens propres à la production industrielle d’éléments ou d’ensembles réalisant soit des fonctions purement mécaniques (transmissions: engrenages par exemple), soit des… …
52Dispersion (optics) — This article is about dispersion of waves in optics. For other forms of dispersion, see Dispersion (disambiguation). In a prism, material dispersion (a wavelength dependent refractive index) causes different colors to refract at different angles …
53Radioisotope thermoelectric generator — A radioisotope thermoelectric generator (RTG, RITEG) is an electrical generator which obtains its power from radioactive decay. In such a device, the heat released by the decay of a suitable radioactive material is converted into electricity by… …
54M1 Garand — Rifle, Caliber .30, M1 M1 Garand with en bloc clips. Type Semi automatic rifle Place of origin …
55MICROSCOPIE — La révolution qui consiste, à la fin du XVIe siècle, à regarder «à la loupe» non plus directement un objet, mais son image agrandie est à l’origine de la microscopie. L’étymologie (du grec mikros , petit, et skopein , examiner) renvoie à l’examen …
56Rifle — A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ( rifling ) cut into the barrel walls. The raised areas of the rifling are called lands, which make contact with the… …
57M1 Garand rifle — Infobox Weapon name=Rifle, Caliber .30, M1 caption= origin=flag|United States type=Semi automatic rifle is ranged=yes service=1936–1963 used by=See Users wars=World War II, Korean War, Vietnam War (limited) designer=John C. Garand design… …
58BB gun — BB guns are a type of air gun designed to shoot projectiles called BB after the Birdshot pellet of approximately the same size. These projectiles are usually spherical but can also be pointed; those are usually used for bird hunting. Modern day… …
59Spider bite — redirects here. For The Spider Bite urban legend, see The Spider Bite. Spider bite Classification and external resources Chelicerae of a black wishbone (nemesiid) spider, a mygalomorph …
60List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
