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  2. Film perforations - Wikipedia

    en.wikipedia.org/wiki/Film_perforations

    For 35 mm film these are 0.1866" and 0.1870" (4.740 mm and 4.750 mm); for 16 mm film they are 0.2994" and 0.3000" (7.605 mm and 7.620 mm). This distinction arose because early nitrocellulose film base naturally shrank about 0.3% in processing due to heat, so film printing equipment was designed to account for a size difference between its ...

  3. Lug (hinge) - Wikipedia

    en.wikipedia.org/wiki/Lug_(hinge)

    Lugs are the loops (or protuberances) that exist on both arms of a hinge, featuring a hole for the axis of the hinge. This engineering-related article is a stub . You can help Wikipedia by expanding it .

  4. Pin and hanger assembly - Wikipedia

    en.wikipedia.org/wiki/Pin_and_hanger_assembly

    The beams have holes directly above each other. The two holes are connected using hangers , a pair of connecting plates sandwiching the bridge girders. A pair of large steel pins through the plates and girder webbing provide the hinges, holding up the suspended span while allowing it to move longitudinally.

  5. Hinge - Wikipedia

    en.wikipedia.org/wiki/Hinge

    An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.

  6. List of discontinued photographic films - Wikipedia

    en.wikipedia.org/wiki/List_of_discontinued...

    Adox was a German camera and film brand of Fotowerke Dr. C. Schleussner GmbH of Frankfurt am Main, the world's first photographic materials manufacturer. In the 1950s it launched its revolutionary thin layer sharp black and white kb 14 and 17 films, referred to by US distributors as the 'German wonder film'. [1]

  7. Concealed hinge jig - Wikipedia

    en.wikipedia.org/wiki/Concealed_hinge_jig

    Concealed hinge drilling jig with embedded Forstner bit. A concealed hinge drilling jig is a type of support jig, designed for drilling 3 cm holes to fit concealed hinges into modern wardrobe doors. As many of the complementary tools used in woodworking, it uses an electric hand-drill for its operation, making a Forstner bit to turn.

  8. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    A Forstner bit could bore the mounting hole for the hinge, but particle board and MDF are very abrasive materials, and steel cutting edges soon wear. A tungsten carbide cutter is needed, but the complex shape of a forstner bit is difficult to manufacture in carbide, so this special drill bit with a simpler shape is commonly used.

  9. 35 mm movie film - Wikipedia

    en.wikipedia.org/wiki/35_mm_movie_film

    35 mm film is a film gauge used in filmmaking, and the film standard. [1] In motion pictures that record on film, 35 mm is the most commonly used gauge. The name of the gauge is not a direct measurement, and refers to the nominal width of the 35 mm format photographic film, which consists of strips 1.377 ± 0.001 inches (34.976 ± 0.025 mm) wide.

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