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  2. Underwire bra - Wikipedia

    en.wikipedia.org/wiki/Underwire_bra

    Underwire bra. An underwire demi bra. An underwire bra (also under wire bra, under-wire bra, or underwired bra) is a brassiere that utilizes a thin, semi-circular strip of rigid material fitted inside the brassiere fabric to help lift, separate, shape, and support a woman's breasts. The wire may be made of metal, plastic, or resin.

  3. Metal - Wikipedia

    en.wikipedia.org/wiki/Metal

    A metal (from Ancient Greek μέταλλον (métallon) 'mine, quarry, metal') is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not. [1] : .

  4. All American Five - Wikipedia

    en.wikipedia.org/wiki/All_American_Five

    The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.

  5. Polygraph - Wikipedia

    en.wikipedia.org/wiki/Polygraph

    A polygraph, often incorrectly referred to as a lie detector test, [1] [2] [3] is a junk science [4] [5] [6] device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked and answers a series of questions. [7]

  6. Defect detector - Wikipedia

    en.wikipedia.org/wiki/Defect_detector

    It then returns to its normal position to prepare for anything else that might be dragging under the train. The detector will register this action and flag it as a defect. Brittle bars are still used elsewhere, but still have to be repaired. Over time, dragging equipment detector's metal flaps need to be replaced because of extensive damage to ...

  7. Proximity sensor - Wikipedia

    en.wikipedia.org/wiki/Proximity_sensor

    A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation ( infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity ...

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