Diving helmet in Centrum Nauki Kopernik. This image has been originally created as the illustration for <a rel="nofollow" class="external text" href="https://szarada.net/okreslenie-z-krzyzowki/-nurkowy-do-schodzenia-pod-wode/">... . nurkowy, do schodzenia pod wodę</a> entry in szarada.net crosswords dictionary. It has been released under CC-BY-3.0 license.
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