Process for excavating and constructing tunnel and excavating de
Process for making a tunnel and advancing a tunneling read with
Process of providing an elongate underground cavity
Recoverable tunnelling machine
Rectangular shield excavating machine
Rock drilling rig
Sardine-bone construction method for large-section tunnel
Sealing means for the drive members of drive shields
Seals for tunnelling shields
Shield apparatus for use in tunnelling
Shield driving machine
Shield excavator
Shield for constructing tunnels with in-situ formed concrete lin
Shield for tunneling and mining
Shield tail sealing
Shield tunneling apparatus
Shield tunneling machine
Shield tunneling machine
Shield tunneling machine
Shield tunneling method and assembling and disassembling apparat