circular tunneling machine

circular tunneling machine
туннелепроходческая машина для проведения выработок круглого сечения

English-Russian mining dictionary. .

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  • Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …   Wikipedia

  • Tunnelling shield — A tunnelling shield is a protective structure used in the excavation of tunnels through soil that is too soft or fluid to remain stable during the time it takes to line the tunnel with a support structure of concrete, cast iron or steel. In… …   Wikipedia


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