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  2. Two half-hitches - Wikipedia

    en.wikipedia.org/wiki/Two_half-hitches

    Two half hitches is the commonest of all hitches for mooring in particular and also for general utility. Steel gives the name in 1794. The difference between two half hitches and the clove hitch is that the former, after a single turn around a spar, is made fast around its own standing part, while the latter is tied directly around the spar.

  3. Double-track railway - Wikipedia

    en.wikipedia.org/wiki/Double-track_railway

    In any given country, rail traffic generally runs to one side of a double-track line, not always the same side as road traffic. Thus in Belgium, China, France (apart from the classic lines of the former German Alsace and Lorraine), Sweden (apart from Malmö and further south), Switzerland, Italy and Portugal for example, the railways use left-hand running, while the roads use right-hand running.

  4. Continuous Automatic Warning System - Wikipedia

    en.wikipedia.org/wiki/Continuous_Automatic...

    The system consists of coded track circuits and on-board equipment. The coded track circuits transmit information about the signal aspect to the on-board equipment via two pick-up coils mounted on the front of the train, one over each rail. The 50 Hz carrier signal is modulated with pulsed square wave codes according to the signal aspect. No ...

  5. Double junction - Wikipedia

    en.wikipedia.org/wiki/Double_junction

    Double junction, or level junction (left hand running). A double junction is a railway junction where a double-track railway splits into two double track lines. Usually, one line is the main line and carries traffic through the junction at normal speed, while the other track is a branch line that carries traffic through the junction at reduced speed.

  6. Rolling hitch - Wikipedia

    en.wikipedia.org/wiki/Rolling_hitch

    The Ashley Book of Knots identifies these two variations as "Rolling Hitch (1)" and "Rolling Hitch (2)" and numbers them #1734 and #1735 respectively. Despite the potential for confusion with the older usage, Ashley chose the name "Magnus Hitch" to refer to knot #1736, which is simply #1734 tied with the final hitch made in the opposite ...

  7. Aktiv Grizzly - Wikipedia

    en.wikipedia.org/wiki/Aktiv_Grizzly

    The first dual-track snowmobiles that Aktiv made were the Snö-Tric Blå 75- and SC 20/2 75-. The Grizzly was also sold under license by Polaris Industries as the "Polaris Grizzly de luxe". This version had a Fuji 440 ccm engine. Also the Finnish company Winha sold early models of Grizzlies produced in 1982 and 1983 under their own brand name ...