Test drilling for the S 18 Bodenseeschnellstrasse (Highway) in the Dornbirner Ried with a Wirth pile drilling machine B1A on a crawler undercarriage from Gemmo (Italy, Noventa Vicentina).
<a href="//commons.wikimedia.org/wiki/User:Asurnipal" title="User:Asurnipal">Asurnipal</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>