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  2. Gauge block - Wikipedia

    en.wikipedia.org/wiki/Gauge_block

    A gauge block is a block of metal or ceramic with two opposing faces ground precisely flat and parallel, a precise distance apart. Standard grade blocks are made of a hardened steel alloy, while calibration grade blocks are often made of tungsten carbide (WC), chromium carbide (CrC) or ceramic (SiO 2 -based) because they are harder and wear ...

  3. Feeler gauge - Wikipedia

    en.wikipedia.org/wiki/Feeler_gauge

    Feeler gauge. Feeler gauge set (25 pieces, 0.03~1.0 mm measurement range) Measuring the valve clearance of a DOHC engine, between camshaft and tappet (here: 0.004 in ≈ 0.10 mm). A feeler gauge is a tool used to measure gap widths. Feeler gauges are mostly used in engineering to measure the clearance between two parts. [1]

  4. Carl Edvard Johansson - Wikipedia

    en.wikipedia.org/wiki/Carl_Edvard_Johansson

    Died. September 30, 1943. (1943-09-30) (aged 79) Eskilstuna, Södermanland, Sweden. Carl Edvard Johansson (March 15, 1864 – September 30, 1943) was a Swedish inventor and scientist. Johansson invented the gauge block set, also known as "Jo Blocks" ("Johansson gauge blocks"). [1][2] He was granted his first Swedish patent on 2 May 1901 ...

  5. Alaskan king crab fishing - Wikipedia

    en.wikipedia.org/wiki/Alaskan_king_crab_fishing

    Alaskan king crab fishing is carried out during the fall in the waters off the coast of Alaska and the Aleutian Islands. The commercial catch is shipped worldwide. Large numbers of king crab are also caught in Russian and international waters. In 1980, at the peak of the king crab industry, Alaskan fisheries produced up to 200,000,000 pounds ...

  6. LMS Stanier Class 5 4-6-0 - Wikipedia

    en.wikipedia.org/wiki/LMS_Stanier_Class_5_4-6-0

    In 1948, George Ivatt introduced more modifications to bearings and valve gear; other experimental Ivatt features included the use of steel rather than copper fireboxes on certain engines, and the fitting of double blastpipes & chimneys in some instances. 44738-57 were built with Caprotti valve gear.

  7. Mine flail - Wikipedia

    en.wikipedia.org/wiki/Mine_flail

    A preserved World War II Sherman Crab, an M4 Sherman tank fitted with a flail. A mine flail is a vehicle-mounted device that makes a safe path through a minefield by deliberately detonating land mines in front of the vehicle that carries it. They were first used by the British during World War II. The mine flail consists of a number of heavy ...

  8. Profile gauge - Wikipedia

    en.wikipedia.org/wiki/Profile_gauge

    A contour gauge set to the profile of a small pot A contour gauge. A profile gauge or contour gauge is a tool for recording the cross-sectional shape of a surface. Contour gauges consist of a set of steel or plastic pins that are set tightly against one another in a frame which keeps them in the same plane and parallel while allowing them to move independently, perpendicularly to the frame.

  9. Ultrasonic thickness measurement - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_Thickness...

    Ultrasonic thickness measurement. In the field of industrial ultrasonic testing, ultrasonic thickness measurement (UTM) is a method of performing non-destructive measurement (gauging) of the local thickness of a solid element (typically made of metal, if using ultrasound testing for industrial purposes) based on the time taken by the ultrasound ...