service transformer
41Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
42telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… …
43steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
44Copper wire and cable — Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.[1][2] The invention of the telephone in 1876 proved to be another early boon for copper wire.[3] Today, despite competition from… …
45Histoire économique et démographique de la Charente-Maritime — Au cours de ces deux derniers siècles, la Charente Maritime a franchi en plusieurs étapes des seuils démographiques importants, dont celui symbolique du demi million d’habitants après 1975. Cependant, cette croissance démographique ne s’est pas… …
46Liste des personnages de Soul Eater — Cet article présente et détaille les personnages du manga et de l anime Soul Eater. Sommaire 1 Les élèves 1.1 Maka Albarn 1.2 Soul Eater 1.3 …
47Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
48Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
49Nouméa — 22° 16′ 33″ S 166° 27′ 29″ E / 22.2758, 166.4580 …
50Innovation — L innovation est le résultat de l action d innover[1]. C est un changement dans le processus de pensée visant à exécuter une action nouvelle. Elle se distingue d une invention ou d une découverte dans la mesure où elle s inscrit dans une… …
