Konstantin Khrenov
... that underwater welding was invented by Konstantin Khrenov in 1932?
... that <a href="./Hyperbaric_welding" id="mwDPg" rel="mw:WikiLink" title="Hyperbaric welding">underwater welding</a> was invented by <b id="mwDPk"><a href="./Konstantin_Khrenov" id="mwDPo" rel="mw:WikiLink" title="Konstantin Khrenov">Konstantin Khrenov</a></b> in 1932?