...rers to visit. Almost all the time,TBMs are manufactured after they a...re for some large-diameter complex TBMs.
The cost of a tunnel bori...Especially for the large diameter TBMs used for multi-level, multi-l...there will be a need to use Slurry TBMs which generally tend to be ev...
...anufacturers a lot. A bit like Gilette model (selling the razor cheaply and then making money on repeat selling replacable blades). Except that the TBMs themselves were also very exp...