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  2. Railway coupling by country - Wikipedia

    en.wikipedia.org/wiki/Railway_coupling_by_country

    English couplers on 1,676 mm (5 ft 6 in) and on 1,435 mm (4 ft 8 + 12 in) standard gauge [7] AAR couplers on 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge [7] and some passenger (FIAT 7131 DMUs) and freight rolling stock on standard and broad gauge. Small knuckle coupler with slot in knuckle for link and pin couplers on 750 mm (2 ft 5 + 1 ...

  3. Keystone module - Wikipedia

    en.wikipedia.org/wiki/Keystone_module

    A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular face of 14.5 mm wide by 16.0 mm high and are held in place with flexible tabs.

  4. Railway coupling - Wikipedia

    en.wikipedia.org/wiki/Railway_coupling

    It is also used on the 1,435 mm (4 ft 8 + 12 in) standard gauge networks of Iran and on Malmbanan in Sweden for ore trains. Some 2 ft (610 mm) gauge cane tramway vehicles in Queensland have been fitted with miniature Willison couplers. [27] It was introduced on the 2 ft (610 mm) narrow-gauge Avontuur Railway of the South African Railways ...

  5. Category 6 cable - Wikipedia

    en.wikipedia.org/wiki/Category_6_cable

    A Cat 6 patch cable, terminated with 8P8C modular connectors. Category 6 cable (Cat 6) is a standardized twisted pair cable for Ethernet and other network physical layers that is backward compatible with the Category 5/5e and Category 3 cable standards. Cat 6 must meet more stringent specifications for crosstalk and system noise than Cat 5 and ...

  6. Modular connector - Wikipedia

    en.wikipedia.org/wiki/Modular_connector

    The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]

  7. Buffers and chain coupler - Wikipedia

    en.wikipedia.org/wiki/Buffers_and_chain_coupler

    Narrow gauge flat wagons, 750 mm (2 ft 5 + 12 in).Note the single buffer with a hook on the right side and a chain on the other. On some narrow-gauge lines in Europe, and on the Paris Metro, a simplified version of the loose-coupler is used, consisting of a single central buffer with a chain underneath.

  8. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    The hybrid ring coupler, also called the rat-race coupler, is a four-port 3 dB directional coupler consisting of a 3λ/2 ring of transmission line with four lines at the intervals shown in figure 12. Power input at port 1 splits and travels both ways round the ring.

  9. Bus coupler - Wikipedia

    en.wikipedia.org/wiki/Bus_coupler

    A bus coupler is a device which is used to couple ... with 1.4:1 transformer ratios and 59 ohm (2 watt 1%) resistors. ... sizes and shapes of boxes and slim inline ...

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