Several decades have passed since the City of Katowice (Province of Silesia in the South of Poland) carried out a truly revolutionary and technologically advanced, at that time, project involving construction of a sports / entertainment hall widely known as "Spodek" ("The Saucer"). Recently the city centre and its residents have seen another sample of the state-of-the-art engineering work, namely microtunnelling, a trenchless technology selected by the investors of construction of the "Welnowiecki" II general-purpose main sewer.
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