- hard rock shielded tunnel boring machine
- тунеллепроходческая машина в щитовой оболочке для проходки туннелей по крепким породам
English-Russian mining dictionary. В.П. Манышев.
hard rock shielded tunnel boring machine
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Tunnel boring machine — A tunnel boring machine that was used at Yucca Mountain nuclear waste repository A tunnel boring machine (TBM) also known as a mole , is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.… … Wikipedia
