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  2. EPDM rubber - Wikipedia

    en.wikipedia.org/wiki/EPDM_rubber

    EPDM rubber (ethylene propylene diene monomer rubber) [1] [2] [3] is a type of synthetic rubber that is used in many applications. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers with a saturated polyethylene chain (the M deriving from the more correct term polymethylene).

  3. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    The half-angle (between the taper surface and the axis of the pipe) is arctan(1 ⁄ 32) ≈ 1.7899° ≈ 1° 47′. The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with the abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes.

  4. Floppy disk drive interface - Wikipedia

    en.wikipedia.org/wiki/Floppy_disk_drive_interface

    The de facto standard 8 inch FDD interface is based upon the Shugart Associates models SA800/801 [3] FDDs and models SA850/851 [4] FDDs. [5]: 171 The signal interface uses a 50-pin PCB edge connector which mates to a flat ribbon cable connector. Separate connectors are provided for both AC and DC power, as many 8 inch drives used AC spindle motors.

  5. List of spreadsheet software - Wikipedia

    en.wikipedia.org/wiki/List_of_spreadsheet_software

    Both free and paid versions are available. It can handle Microsoft Excel .xls and .xlsx files, and also produce other file formats such as .et, .txt, .csv, .pdf, and .dbf. It supports multiple tabs, VBA macro and PDF converting. [10] Lotus SmartSuite Lotus 123 – for MS Windows. In its MS-DOS (character cell) version, widely considered to be ...

  6. ANSI/ASME Y14.1 - Wikipedia

    en.wikipedia.org/wiki/ANSI/ASME_Y14.1

    A size chart illustrating the ANSI sizes. In 1992, the American National Standards Institute adopted ANSI/ASME Y14.1 Decimal Inch Drawing Sheet Size and Format, [1] which defined a regular series of paper sizes based upon the de facto standard 8 + 1 ⁄ 2 in × 11 in "letter" size to which it assigned the designation "ANSI A".

  7. Decorative laminate - Wikipedia

    en.wikipedia.org/wiki/Decorative_laminate

    Decorative laminate Roll and sheet of decorative laminate. Decorative laminates are laminated products primarily used as furniture surface materials or wall paneling.It can be manufactured as either high- or low-pressure laminate, with the two processes not much different from each other except for the pressure applied in the pressing process.

  8. Large format - Wikipedia

    en.wikipedia.org/wiki/Large_format

    The most common large format is 4×5 inches (10.2x12.7 cm), which was the size used by cameras like the Graflex Speed Graphic and Crown Graphic, among others. Less common formats include quarter-plate (3.25x4.25 inches (8.3x10.8 cm)), 5×7 inches (12.7x17.8 cm), and 8×10 inches (20×25 cm); the size of many old 1920s Kodak cameras (various versions of Kodak 1, 2, and 3 and Master View cameras ...

  9. PTC Creo Elements/Direct Drafting - Wikipedia

    en.wikipedia.org/wiki/PTC_Creo_Elements/Direct...

    Creo Elements/Direct Drafting now owned by PTC, and formerly called ME10 is a CAD software application exclusively for 2D drawings, especially in mechanical engineering and electrical engineering. The program was first developed by Hewlett Packard in Germany. HP released the first version 1986.