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  2. Savinelli Pipes - Wikipedia

    en.wikipedia.org/wiki/Savinelli_Pipes

    Savinelli Pipes is an Italian smoking pipe maker headquartered in Milan and founded in 1876. [ 1 ] [ 2 ] The company makes machine and carved pipes, and is recognized for its craftsmanship. [ 3 ]

  3. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    A common size for cells inside cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. 1 ⁄ 2-, 4 ⁄ 5 - and 5 ⁄ 4-sub-C sizes (differing in length) are also available. Soviet 332 type can be replaced with R10 (#4, 927, BF, U8) or 1.5 V elements from 3 V 2xLR10 packs ...

  4. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

  5. Aeronautical chart conventions (United States) - Wikipedia

    en.wikipedia.org/wiki/Aeronautical_chart...

    A sectional chart is a two-sided chart created from a Lambert Conformal Conic Projection [1] with two defined standard parallels. The scale is 1:500,000, with a contour interval of 500 feet. The size of each sectional is designed to be "arm's width" when completely unfolded.

  6. List of Cessna models - Wikipedia

    en.wikipedia.org/wiki/List_of_Cessna_models

    Cessna 320 Skyknight: 577 Twin piston engine monoplane utility airplane Cessna 321: 27 [1] Single piston engine monoplane observation airplane Cessna 325: 2 [1] Single piston engine monoplane agricultural airplane Cessna 327: 1 [1] Twin piston engine monoplane utility airplane Cessna 330: Twin piston engine monoplane utility airplane Cessna 335: 65

  7. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

  8. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.

  9. List of musical instruments by Hornbostel–Sachs number: 321.31

    en.wikipedia.org/wiki/List_of_musical_instruments...

    This is a list of instruments by Hornbostel–Sachs number, covering those instruments that are classified under 321.31 under that system. These instruments are also known as spike lutes . These instruments are made of a resonator and string bearer that are physically united, with strings in parallel to the sound table and a handle which is ...