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  2. Caliber conversion device - Wikipedia

    en.wikipedia.org/wiki/Caliber_conversion_device

    One exception to the use of a special lightweight bolt was the Colt Service Ace, offered as a complete pistol or as a conversion kit for the M1911. While still nominally a blowback conversion, the Service Ace used a special "floating" chamber in the barrel that acted like a gas operated firearm's piston, helping push the bolt back with more ...

  3. PDFtk - Wikipedia

    en.wikipedia.org/wiki/Pdftk

    PDFtk (short for PDF Toolkit) is a toolkit for manipulating Portable Document Format (PDF) documents. [ 3 ] [ 4 ] It runs on Linux , Windows and macOS . [ 5 ] It comes in three versions: PDFtk Server ( open-source command-line tool ), PDFtk Free ( freeware ) and PDFtk Pro ( proprietary paid ). [ 2 ]

  4. Parking pawl - Wikipedia

    en.wikipedia.org/wiki/Parking_pawl

    The parking pawl locks the transmission's output shaft to the transmission casing by engaging a pawl (a pin) that engages in a notched wheel on the shaft, stopping it (and thus the driven wheels) from rotating.

  5. Pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Pin_tumbler_lock

    The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.

  6. Positive locking device - Wikipedia

    en.wikipedia.org/wiki/Positive_locking_device

    A wheel hub with a castellated nut secured in the center using a cotter pin to prevent it from unscrewing. A positive locking device is a device used in conjunction with a fastener in order to positively lock the fastener.

  7. Universal Disk Format - Wikipedia

    en.wikipedia.org/wiki/Universal_Disk_Format

    Metadata (up to v2.50) and file data is addressed more or less directly. In writing to such a disk in this format, any physical block on the disk may be chosen for allocation of new or updated files. Since this is the basic format, practically any operating system or file system driver claiming support for UDF should be able to read this format.

  8. Interchangeable core - Wikipedia

    en.wikipedia.org/wiki/Interchangeable_core

    The lowermost segment is part of the lock unit and not an extension of the "small format" core. The "modern interchangeable core" [ 2 ] —and all other cores, as well—actually has its roots in "a bulkier, pedestal-shaped removable configuration" [ 3 ] developed in 1919 by Frank Best, then proprietor of Best Universal Lock Company.

  9. ISO standards for trailer connectors - Wikipedia

    en.wikipedia.org/wiki/ISO_standards_for_trailer...

    13-pin trailer connector of Jaeger type. (screw terminals - trailer PLUG). see photograph typical rear of 13 pin trailer Plug showing terminals with pin numbers. Physical design of the standard ISO 11446 [2] [3] but also called Jaeger-connector from the company that developed it.