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  2. Individual integrated fighting system - Wikipedia

    en.wikipedia.org/wiki/Individual_Integrated...

    A pull tab is used to open the pocket. The shoulders are protected by 1/2 inch [1.27 cm] foam padding. The ammunition carrying vest closes in front with two chest straps using plastic quick release buckles. Two 2 1 ⁄ 4 inch [5.71 cm] webbing and two D-rings sewn to the back of the ammunition carrying vest can be used as equipment attachment ...

  3. Two-inch mortar - Wikipedia

    en.wikipedia.org/wiki/Two-inch_mortar

    Postwar, the two-inch mortar was kept in service to fire smoke and illuminating rounds. It was replaced by the Royal Ordnance 51 mm infantry mortar [4] in the late 1980s. Specifications. Calibre: 2 inches (50.8 mm) Length: 21 inches (53 cm) Weight: 10 + 1 ⁄ 2 pounds (4.8 kg) Firing mechanism: Trip (small trigger) Elevation: 45-90° Range: 500 ...

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  5. Process duct work - Wikipedia

    en.wikipedia.org/wiki/Process_Duct_Work

    Process duct work may be round or rectangular. Although round duct work costs more to fabricate than rectangular duct work, it requires fewer stiffeners and is favored in many applications over rectangular ductwork. The air in process duct work may be at ambient conditions or may operate at up to 900 °F (482 °C).

  6. Chimney - Wikipedia

    en.wikipedia.org/wiki/Chimney

    g = gravitational acceleration, 9.807 m/s 2; H = height of chimney, m; T i = average temperature inside the chimney, K; T e = external air temperature, K. Combining two flows into chimney: A t +A f <A, where A t =7.1 inch 2 is the minimum required flow area from water heater tank and A f =19.6 inch 2 is the minimum flow area from a furnace of a ...

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