Panama Metro Line 3 diaphragm wall construction by German company Bauer - close view
Panama Metro Line 3 diaphragm wall construction by German company Bauer - close view from press information: https://geotechnical-solutions.bauer.de/en/diaphragm-wall-work-metro-expansion-panamaChina Railway Tunnel Group TBM breakthrough at Georgia Gudauri Tunnel
China Railway Tunnel Group (CRTG) TBM breakthrough at Georgia Gudauri Tunnel photograph is press release of CRTG https://www.prnewswire.com/news-releases/successful-breakthrough-of-gudauri-tunnel-in-georgias-north-south-corridor-kk-highway-project-302124845.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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