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  2. List of driverless train systems - Wikipedia

    en.wikipedia.org/wiki/List_of_driverless_train...

    Name of system Line Date System Notes Denmark: Copenhagen Metro: Line M1: 19 October 2002: AnsaldoBreda Driverless Metro / Ansaldo STS DTG [11] Line M2: Line M3: 29 September 2019: AnsaldoBreda Driverless Metro / Ansaldo STS CBTC Line M4: 28 March 2020: France: CDGVAL: Line 1: 3 April 2007: VAL system: Line 2: 27 June 2007: Lille Metro: Line A ...

  3. Laser level - Wikipedia

    en.wikipedia.org/wiki/Laser_level

    The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...

  4. List of semi-automatic train systems - Wikipedia

    en.wikipedia.org/wiki/List_of_semi-automatic...

    Name of system Line Date System Notes China: Beijing Subway: Line 1: 9 December 2015: CASCO/Alstom Urbalis 888 [8] Previously used Westinghouse ATC in GoA1 [9] Line 2: 9 June 2008: Line 4: 28 September 2009: SelTrac: Line 5: 7 October 2007: Westinghouse ATC: Newer BTCT LCF-300 will be added and interoperable with existing system Line 6: 30 ...

  5. The 7 Best Laser Levels of 2023, Tested and Reviewed - AOL

    www.aol.com/7-best-laser-levels-2023-164302693.html

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  6. Level (optical instrument) - Wikipedia

    en.wikipedia.org/wiki/Level_(optical_instrument)

    This reduces the need to set the instrument base truly level, as with a dumpy level. Self-levelling instruments are the preferred instrument on building sites, construction, and during surveying due to ease of use and rapid setup time. A digital electronic level is also set level on a tripod and reads a bar-coded staff using electronic laser ...

  7. Autonomous Rail Rapid Transit - Wikipedia

    en.wikipedia.org/wiki/Autonomous_Rail_Rapid_Transit

    Autonomous Rail Rapid Transit (ART) is a lidar (light detection and ranging) guided bi-articulated bus system for urban passenger transport. Developed and manufactured by CRRC through CRRC Zhuzhou Institute Co Ltd , it was unveiled in Zhuzhou in the Hunan province on June 2, 2017.