electroslag welding
...that in 1977, the U.S. Federal Highway Administration banned the use of electroslag welding for joining certain bridge structural members due to quality concerns?
...that in <a href="./1977" id="mwBYo" rel="mw:WikiLink" title="1977">1977</a>, the <a href="./United_States" id="mwBYs" rel="mw:WikiLink" title="United States">U.S.</a> <a href="./Federal_Highway_Administration" id="mwBYw" rel="mw:WikiLink" title="Federal Highway Administration">Federal Highway Administration</a> banned the use of <b id="mwBY0"><a href="./Electroslag_welding" id="mwBY4" rel="mw:WikiLink" title="Electroslag welding">electroslag welding</a></b> for joining certain <a href="./Bridge" id="mwBY8" rel="mw:WikiLink" title="Bridge">bridge</a> structural members due to quality concerns?