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The immersed tube method, a version of the cut and ... Underwater tunnels around the world, including Hong Kong's metro tunnel system and San Francisco's Bay Area Rapid Transit tunnel, were ...
instead of the cut-and-cover method KOLKATA: Metro Railway decided to deploy tunnel borers to build Purple Line's 1.6-km extended Esplanade-Eden Gardens section. From L20 bus stand to Eden The ...
The immersed tube method, a version of the cut and ... Underwater tunnels around the world, including Hong Kong's metro tunnel system and San Francisco's Bay Area Rapid Transit tunnel, were ...
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