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Multiple techniques take Swiss road tunnel through wet, partly saturated ground. (WT Focus).(Statistical Data Included)
World Tunnelling; Aug 1, 2001; ; 700+ Words ...highway appurtenant works was let to a four-member Swiss joint venture led by Walo Bertschinger AG and comprising Brunner Erben AG, Zublin Schlittler Bau AG, and Rothpletz Lienhard + Cie AG. The contract with the County of Thurgau was let for a tender...
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