Author: Tom Anderson
Date: Jul 24, 2008 04:25
... Crossrail vertical alignment diagram, showing tunnels dodged: http://www.crossrail.co.uk/... will be dug are fascinating. IOW, boring is interesting. London, it seems, ... Dock portal, though, the tunnel is deeper, and largely bored right through the ...and these layers fade away, the tunnel is right through chalk. Anyway, ...you could have a Clay-specific machine on that one, and a Group...
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