At 170m long, "Florence" is the largest ever tunnelling machine to be used on a UK rail project.
from BBC News - Home HS2 high-speed rail project begins underground tunnelhttps://https://ift.tt/3uJqOb3
from BBC News - Home HS2 high-speed rail project begins underground tunnelhttps://https://ift.tt/3uJqOb3
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