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  2. Jiangmen Underground Neutrino Observatory - Wikipedia

    en.wikipedia.org/wiki/Jiangmen_Underground...

    The main detector consists of a 35.4 m (116 ft) diameter transparent acrylic glass sphere containing 20,000 tonnes of linear alkylbenzene liquid scintillator, surrounded by a stainless steel truss supporting approximately 43,200 photomultiplier tubes (17,612 large 20-inch (51 cm) diameter tubes, and 25,600 3-inch (7.6 cm) tubes filling in the gaps between them), immersed in a water pool ...

  3. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    A hydrostatic test is a way in which pressure vessels such as pipelines, plumbing, gas cylinders, boilers and fuel tanks can be tested for strength and leaks. The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection, and pressurization of the vessel to the specified test ...

  4. Secchi disk - Wikipedia

    en.wikipedia.org/wiki/Secchi_disk

    Secchi disk. The modified Secchi disk design used in fresh water. The Secchi disk (or Secchi disc), as created in 1865 by Angelo Secchi, is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency or turbidity in bodies of water. The disc is mounted on a pole or line and lowered slowly down in the water.

  5. Glossary of firefighting equipment - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting...

    A single piece of fire apparatus that can operate as either a rescue or an engine. This apparatus normally is outfitted with heavy rescue equipment, hoselines, pump, water tank, etc. Rex Tool A twenty-four inch bar with a U-shaped head, designed for grabbing and pulling lock cylinders. The other end is a chisel tip. Rig See apparatus. Ringdown ...

  6. Inch of water - Wikipedia

    en.wikipedia.org/wiki/Inch_of_water

    It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions. At a temperature of 4 °C (39.2 °F) pure water has its highest density (1000 kg/m 3). At that temperature and assuming the standard acceleration of gravity, 1 inAq is approximately 249.082 pascals (0.0361263 psi). [2]

  7. Fire hose - Wikipedia

    en.wikipedia.org/wiki/Fire_hose

    Attack hose is a fabric-covered, flexible hose used to bring water from the fire pumper to the nozzle. This hose ranges in nominal inside diameter from 1.5 to 3 in (38 to 76 mm) and is designed to operate at pressures up to about 400 psi (2,760 kPa). The standard length is 50 ft (15.24 m). [12] Supply and relay hoses.

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