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  2. Pouch Attachment Ladder System - Wikipedia

    en.wikipedia.org/wiki/Pouch_Attachment_Ladder_System

    The PALS grid is easily visible in this image of the US Marine Corps' Interceptor Body Armor; note the pouches attached to the system in the background (2005). The Pouch Attachment Ladder System or PALS is a grid of webbing invented and patented by United States Army Natick Soldier Research, Development and Engineering Center used to attach smaller equipment onto load-bearing platforms, such ...

  3. Permissive action link - Wikipedia

    en.wikipedia.org/wiki/Permissive_action_link

    UC1583 PAL controller (early 1990s), based on a commercial Compaq LTE laptop. A permissive action link (PAL) is an access control security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of a nuclear weapon. [1] The United States Department of Defense definition is:

  4. PAL-S - Wikipedia

    en.wikipedia.org/wiki/PAL-S

    In PAL system the polarity of the phase in each frame is reversed to neutralize the undesirable phase shifts introduced during transmission. Thus the effect of undesirable phase shift is positive in one frame and negative in the second frame. Averaging the two, the effect of the undesirable phase shifts in two consecutive frames cancel each other.

  5. Self-ligating bracket - Wikipedia

    en.wikipedia.org/wiki/Self-ligating_bracket

    The first patent for Self-ligating bracket was filed by Charles E. Boyd in 1933. Willam F. ford in 1951 introduced another self-ligating bracket under Johnson Twin wire technique. In 1971, A. J. Wildman introduced the Edgelok bracket which was the first type of self-ligating bracket that enjoyed commercial success. All these brackets were ...

  6. PAL - Wikipedia

    en.wikipedia.org/wiki/PAL

    The PAL colour system (either baseband or with any RF system, with the normal 4.43 MHz subcarrier unlike PAL-M) can also be applied to an NTSC-like 525-line picture to form what is often known as "PAL 60" (sometimes "PAL 60/525", "Quasi-PAL" or "Pseudo PAL"). PAL-M (a broadcast standard) however should not be confused with "PAL 60" (a video ...

  7. Street elbow - Wikipedia

    en.wikipedia.org/wiki/Street_elbow

    Street elbows are available with bend angles of 90°, 45°, and 22.5°. They can be used in many plumbing applications, including water supply, drainage, sewers, vents, central vacuum systems, compressed air and gas lines, heating and air conditioning, sump pump drains, and other locations where plumbing fittings would be used to join sections of pipe.

  8. Angle bracket (fastener) - Wikipedia

    en.wikipedia.org/wiki/Angle_bracket_(fastener)

    An angle bracket or angle brace or angle cleat is an L-shaped fastener used to join two parts generally at a 90-degree angle. It is typically made of metal but it can also be made of wood or plastic. Angle brackets feature holes in them for screws. A typical example use of is a shelf bracket for mounting a shelf on a wall.

  9. Three-section staff - Wikipedia

    en.wikipedia.org/wiki/Three-section_staff

    Three-section staff. The three-section staff, three-part staff, triple staff, originally sanjiegun (Chinese: 三節棍; pinyin: sānjiégùn; Jyutping: saam1 zit3 gwan3) or sansetsukon (Japanese: さんせつこん), three-section whip, originally sanjiebian (Chinese: 三節鞭; pinyin: sānjiébiān; Jyutping: saam1 zit3 bin1), is a Chinese flail weapon that consists of three wooden or metal ...