@ran_dan_ I doubt their quality. I work for a Chinese company, we boring 9 km tunnel. So I attended in TBM assembly procedure and I can proof that every important detail is form Europe, Australia or S. Korea.
Gearbox (reducer) for TBM - made in germany
Gearbox (reducer) for TBM - made in germany
@ran_dan_ Bearings for cutting blades - made in S. Korea.
@ran_dan_ Electric motors of the boring machine - made in Austria
@ran_dan_ Even these bolts and nuts aren't Chinese - these are made in Sweden.
@ran_dan_ But despite this, this is one of the largest drilling machines in the world, which is made in China.
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