Recomendado Artículos De Interés

La historia

Yarnall II DD-541 - Historia

Yarnall II DD-541Yarnall II(DD-541: dp. 2,050; 1. 376& 39;5& 34;; b. 39& 39;7& 34;; dr. 17& 39;9& 34;; s. 35.2 k. (tl.); cpl. 329; a. 5 5& 34;, 10 40mm., 7 20mm.,10 21& 34; tt., 6 dcp., 2 dct.; cl. Fletcher)The second Yarnall (DD-541) was laid down on 6 December 1942 at San Francisco, Calif., by the Bethlehem Steel Co.
Leer Más
La historia

¿Quién inventó el ascensor?

Although elevators may seem like a modern invention, devices used to transport people or goods vertically have been around for thousands of years. According to the writings of Vitruvius, the Greek mathematician Archimedes created a primitive elevator in 236 B.C. that was operated by hoisting ropes wound around a drum and rotated by manpower applied to a capstan.
Leer Más