1. Hoek,Brown Underground Excavation in Rock | Tunnel | Mining

    https://www.scribd.com/.../Hoek-Brown-Underground-Excavation-in-Rock

    Hoek,Brown Underground Excavation in Rock - Ebook download as PDF File (.pdf), Text File (.txt) or read book online.

  2. Comac C919 - Wikipedia

    https://en.wikipedia.org/wiki/Comac_C919

    The Comac C919 is a narrow-body twinjet airliner developed by Chinese aerospace manufacturer Comac. The programme was launched in 2008 and production of the prototype ...