Contractible mine stopping and contractible block member for use
Control method and control equipment for drilling apparatus
Controlling apparatus for excavator
Corner area for tubbing seals
Corrugated structural panels
Device for joining tunnel segments
Device for joining two members together
Device for laying and suspending cables
Device for limiting stresses in particular for buried tubular st
Device for opening and supporting a headway
Device for the mutual support of two construction members
Direction correcting device for shield tunnelling machine
Drill head for a microtunnelling apparatus
Drilling apparatus and method for its control
Drive shield
Drive shield
Drive shields for tunnel-driving apparatus
Driving process of enlarged tunnel
Earth pressure shield
Earth pressure shield