He pledged to 'build a boring machine and just start digging'.
Times, Sunday Times (2018)
The prime minister gave a speech in front of what is described as a 'giant boring machine'.
Times, Sunday Times (2015)
The people who run hydro-geological surveys or tunnel-boring machines are probably all right.
Times, Sunday Times (2017)
Still, it makes the preparations for tunnelling seem interesting, here showing huge boring machines being reassembled (after arriving in pieces) and lowered into position.