bamfordrocks.com.au€¦ · The Western Trunk Sewer Project includes 1 5.3 km of 5.6 m diameter...
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bamfordrocks.com.au€¦ · The Western Trunk Sewer Project includes 1 5.3 km of 5.6 m diameter tunnel, and a Robbins shielded ful 1 —face tunnel boring machine commenced excavating