Associated since 2012

Herrenknecht AG is a German manufacturer of tunnel boring machines of all sizes. Herrenknecht is headquartered in Allmannsweier near Schwanau and is the world market leader for heavy tunnel boring machines.

As of 2005, Herrenknecht holds the world record for constructing the largest tunnel boring machines in the world, at 19 metres (62 ft) diameter.
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