May 27 n 21 p 597-9: Survey and preliminary work for 5 1/2 mi railroad tunnel on new deviation line replacing section with 1 in 15 gradient. June 10 n 23 p 651-4: Construction work; heading and bench methods of excavation.
Rimutaka tunnel, New Zealand railways
Ry Gaz
Railway Gazette ; 102 , n 21, 23
1955
Aufsatz (Zeitschrift)
Englisch
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