TBM

English

Noun

TBM (plural TBMs)

  1. (engineering) Initialism of tunnel boring machine.
    • 2022 December 14, Paul Stephen, “HS2's Dorothy starts to dig second tunnel bore”, in RAIL, number 972, page 23:
      Four other TBMs are currently in the ground, digging twin bore tunnels under the Chilterns and in Greater London.

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