Please read post by Teodor Adamczyk :
The M2 line in Warsaw was bored by four TBM shields from the German company Herrenknecht AG - Maria and Elisabetta and - working on the Bemowo section of the M2 line - Anna and Krystyna.
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://tunnelcontact.com/discussion/view/59378/poland-boring-of-the-m2-line-in-warsaw-continues-with-4-tbm-shields
Poland: Boring of the M2 line in Warsaw continues with 4 TBM shields : TunnelContact.com
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