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Continue to ChatCrews assembling TBM for first ever tunnel under San Francisco Bay https://geoprac.net/2011/06/crews-assembling-tbm-for-first-ever-tunnel-under-san-francisco-bay/
Crews assembling TBM for first ever tunnel under San Francisco Bay https://geoprac.net/2011/06/crews-assembling-tbm-for-first-ever-tunnel-under-san-francisco-bay/