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Journal Articles
Journal of the Institution of Civil Engineers (1949) 31 (4): 331–350.
Published: 01 February 1949
... at thesame time. MECHANMICEAALNS IN POLHILL TUNNEL. 335 336 CANTRELL ON RENEWAL OF BALLAST AND TRACK BY MECHANICAL MEANS IN POLHILL TUNNEL. 337 In order to carry out preliminary works, and to allow time to make traffic and other arrangements for closing the tunnel, the renewalwas postponed beyond its normal...
Journal Articles

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