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  2. Pipe plug - Wikipedia

    en.wikipedia.org/wiki/Pipe_plug

    A pipe plug is a tool or material for the temporary sealing of pipelines in sewerage and other liquid and gas transportation systems; typically for maintenance or non-pressurized line testing. A pipe plug is also known as an inflatable plug, [1] mechanical pipe plug, [2] pipe test plug, pipeline isolation plug, expandable plug, pipe bung, pipe ...

  3. Production packer - Wikipedia

    en.wikipedia.org/wiki/Production_packer

    A production packer[1] is a standard component of the completion hardware of oil or gas wells used to provide a seal between the outside of the production tubing and the inside of the casing, liner, or wellbore wall. Based on their primary use, packers can be divided into two main categories: production packers and service packers.

  4. Electrical outlet tester - Wikipedia

    en.wikipedia.org/wiki/Electrical_outlet_tester

    Electrical outlet tester. A receptacle tester for North American wiring. An electrical outlet tester, receptacle tester, or socket tester is a small device containing a 3-prong power plug and three indicator lights, used for quickly detecting some types of incorrectly-wired electrical wall outlets or campsite supplies.

  5. Goodyear Inflatoplane - Wikipedia

    en.wikipedia.org/wiki/Goodyear_Inflatoplane

    13 February 1956. The Goodyear Inflatoplane is an inflatable experimental aircraft made by the Goodyear Aircraft Company, a subsidiary of Goodyear Tire and Rubber Company, well known for the Goodyear blimp. Although it seemed an improbable project, the finished aircraft proved to be capable of meeting its design objectives, although orders were ...

  6. Banana connector - Wikipedia

    en.wikipedia.org/wiki/Banana_connector

    Many of these plugs are derived from the "double banana" plug, which consists simply of two banana plugs spaced 3 ⁄ 4 inch (19 mm) apart (measured from center to center of each individual plug). The 3 ⁄ 4 inch spacing originated on General Radio test equipment during the 1920s, and their type 274-M dual-plug is a notable example from that ...

  7. AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/AC_power_plugs_and_sockets

    e. AC power plugs and sockets connect devices to mains electricity to supply them with electrical power. A plug is the connector attached to an electrically-operated device, often via a cable. A socket (also known as a receptacle or outlet) is fixed in place, often on the internal walls of buildings, and is connected to an AC electrical circuit.

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