Tower overhang approach system - has tracks above and below, with connecting beam hinged to top carriage
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Cutter-speed and feed-rate regulator for tunnel excavator
ES337835A1
System for the adjustment of the rotation of the strawberry drum and the longitudinal advance of machines intended for the drilling of roads or underground galleries. (Machine-translation by Google Translate, not legally binding)
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Sectional tunnel boring machine
GB1125118A
Improvements in or relating to tunnel driving systems
GB1158607A
Improvements in or relating to Tunnel Driving Machines
US3429617A
Cutter head for use in a tunnel driving machine
DE1534651A1
Cutter head for tunnel boring and tunneling machines
CA825041A
Inserted-tooth cutter head for tunnel driving machines
