signalling apparatus
611996 Channel Tunnel fire — See also: 2008 Channel Tunnel fire Location of the 1996 Channel Tunnel fire The Channel Tunnel fire of 18 November 1996 occurred on a train carrying heavy goods vehicles (HGVs) and their drivers through the Channel Tunnel from France to Great… …
62List of rail accidents in the United Kingdom — This list is of railway accidents in Britain sorted chronologically. For a list sorted by death toll see List of British rail accidents by death toll. It does not include incidents that did not involve rolling stock, such as the King s Cross fire …
63Ceramide — General chemical structure of sphingolipids. When the substituent (R) in this structure is H, the resulting molecule is a ceramide …
64Animal coloration — Chapman s Zebras in Botswana, displaying their outline disrupting camouflage Animal coloration has been a topic of interest and research in biology for well over a century. According to Charles Darwin s 1859 theory of natural selection,[1 …
65List of diving hazards and precautions — Contents 1 Effects of relying on breathing equipment while underwater 2 Effects of barotrauma or pressure damage 2.1 …
66Invention of the telephone — The modern telephone is the result of work done by many people, all worthy of recognition of their contributions to the field. Alexander Graham Bell was the first to patent the telephone, an apparatus for transmitting vocal or other sounds… …
67Alexander Graham Bell — Infobox Person name = Alexander Graham Bell image size = 225px caption = Portrait of Alexander Graham Bell c. 1910 birth date = 3 March 1847 birth place = Edinburgh, Scotland, UK death date = death date and age|1922|8|2|1847|3|3|df=y death place …
68Heinrich Hertz — Infobox Scientist name = Heinrich Rudolf Hertz image width = 230px birth date = birth date|1857|2|22|mf=y birth place = Hamburg, Germany residence = Germany nationality = German death date = death date and age|1894|1|1|1857|2|22|mf=y death place …
69Tesla's oscillator — is a mechanical oscillator conceived of and invented by Nikola Tesla in 1898. It is also referred to as the Earthquake Machine. The machine which Tesla tested was small, around seven inches long, and weighing only one or two pounds; something you …
70ГОСТ 22515-77: Связь телеграфная. Термины и определения — Терминология ГОСТ 22515 77: Связь телеграфная. Термины и определения оригинал документа: 4. Абонентский комплект Устройство, предназначенное для сопряжения коммутационного оборудования с каналом связи, соединяющим оконечную установку с… …
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