double-line block system
1Signalling block system — Signalling block systems enable the safe and efficient operation of railways, so as to avoid collisions between trains. Block systems are used to control trains between stations and yards, and not normally within them. Any block system is defined …
2Double spaced sentences — Double spacing at the ends of sentences is a typographical convention that has sometimes been termed English spacing. Since the mid 1990s, it has often been termed French spacing, although that term has traditionally referred to the practice of… …
3Block booking — is a system of selling multiple films to a theater as a unit. Block booking was the prevailing practice among Hollywood s major studios from the turn of the 1930s through the late 1940s, when it was outlawed by a Supreme Court decision. Under… …
4Block and tackle — A block and tackle [ Tackle can be pronEng|ˈteɪkəl in this usage.] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift or pull heavy loads. TOC Overview Although used in many situations, they are… …
5Double layer (plasma) — This article is about the structure in plasma physics. For other uses, see Double layer. Saturnian aurora whose reddish colour is characteristic of ionized hydrogen plasma.[1] Powered by the Saturnian equivalent of (filamentary) Birkeland… …
6Block cipher modes of operation — This article is about cryptography. For method of operating , see modus operandi. In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.[1][2] A block cipher by itself… …
7Line of Delirium — infobox Book | name = Line of Delirium title orig = Linia Grez, Линия Грез (Russian) image caption = author = Sergei Lukyanenko (Сергей Лукьяненко) country = Russia language = Russian series = Line of Delirium trilogy genre = Space Opera, Science …
8Fly system — Fly loft of the Theater Bielefeld in Germany A fly system, flying system or theatrical rigging system, is a system of lines (e.g. ropes), blocks (pulleys), counterweights and related devices within a theatre that enable a stage crew to quickly,… …
9British absolute block signalling — The principle of the British absolute block system of railway signalling is to facilitate the safe operation of a railway by preventing more than one train from occupying a defined section of route at the same time. This system is used on double… …
10Continuous Automatic Warning System — For the gun, see Heckler Koch HK CAWS. For the wrestling video game creation mode, see Create a wrestler. The Continuous Automatic Warning System (CAWS) is a form of cab signalling and train protection system used in Ireland to help train drivers …
