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Italy: The last diaphragm of the S. Ambrogio tunnel is broken though, a fundamental stage for the doubling of the Palermo-Messina railway line

    Roberto Calvi
    By Roberto Calvi Replies (1)

    Thus the two excavation fronts of the gallery are combined, allowing the completion of a tunnel almost 4 km long, fully excavated with a traditional method, on the Ogliastrillo-Castelbuono section.

    https://livesicilia.it/raddoppio-palermo-messina-abbattuto-ultimo-diaframma-galleria-santambrogio/

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