ducting: Revision history

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7 October 2017

  • curprev 17:3017:30, 7 October 2017Equinox talk contribs 416 bytes +272 #* '''2005''', Dimitrios Kolymbas, ''Tunnelling and Tunnel Mechanics: A Rational Approach to Tunnelling'' #*: The '''ductings''' are extendable tubes made of synthetic or steel sheets (Fig. 2.1). Their cross section amounts to ca 1/60 to 1/30 of the tunne undo

25 May 2017

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15 November 2008