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  2. Steam locomotive components - Wikipedia

    en.wikipedia.org/wiki/Steam_locomotive_components

    A shield made from bars, cast steel or sheet steel to prevent an object on the track from going under the locomotive and possibly derailing the train. [3]: 59 Coupler (US+) Coupling (UK+) Device at the front and rear of the locomotive for connecting locomotives and rolling stock. [1] [5] [3]: 31

  3. File:Multiplexer-based latch using transmission gates.svg

    en.wikipedia.org/wiki/File:Multiplexer-based...

    English: Diagram of a latch constructing using a multiplexer, viewed as a pair of transmission gates and three inverters. Date: 12 November 2009: Source: Own work:

  4. Flip-flop (electronics) - Wikipedia

    en.wikipedia.org/wiki/Flip-flop_(electronics)

    A gated SR latch circuit diagram constructed from AND gates (on left) and NOR gates (on right) A gated SR latch can be made by adding a second level of NAND gates to an inverted SR latch. The extra NAND gates further invert the inputs so a SR latch becomes a gated SR latch (a SR latch would transform into a gated SR latch with inverted enable).

  5. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    Sometimes a layer of color coating is applied to the surface of the cold-rolled sheet to obtain a decorative and protective metal sheet, generally called a color-coated metal sheet. Sheet metal is used in automobile and truck (lorry) bodies , major appliances , airplane fuselages and wings , tinplate for tin cans , roofing for buildings ...

  6. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions.

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Gate valve - Wikipedia

    en.wikipedia.org/wiki/Gate_valve

    Gate valves may have flanged ends drilled according to pipeline-compatible flange dimensional standards. Gate valves are typically constructed from cast iron, cast carbon steel, ductile iron, gunmetal, stainless steel, alloy steels, and forged steels. All-metal gate valves are used in ultra-high vacuum chambers to isolate regions of the chamber ...

  9. Gate - Wikipedia

    en.wikipedia.org/wiki/Gate

    The moving part or parts of a gateway may be considered "doors", as they are fixed at one side whilst opening and closing like one. [2] A gate may have a latch that can be raised and lowered to both open a gate or prevent it from swinging. [3] Gate operation can be either automated or manual. Locks are also used on gates to increase security.