Japan. Shoddy tunnel work cause of road cave-ins in western Tokyo
...Shimbun news is in English. "The report found that heavy bore machinery encountered difficulties tunn...were poured into the site to facilitate the work. But that led to the machinery excavating an excessive amoun...What is the difference between welding, soldering and brazing
...There are various methods for melting the brazing material. In tunnel machinery industry, for Y-Parts the mos...nt! Predictability is still a quality! Having said this; in tunnel machinery industry, as far as the Y-par...YOL-TÜNEL 2019 - 4th International Roads, Bridges and Tunnels Fair
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