No. 84-7823. Argued and Submitted June 14, 1985. August 9, 1985. Elliott Moore, Howard Perlstein, Washington, D.C., for petitioner. David A. Rosenfeld, Van Bourg, Allen, Weinberg Roger, San Francisco, Cal., for respondent. Petition for Enforcement of an Order of the National Labor Relations Board. Before BROWNING, ANDERSON and NELSON, Circuit Judges. NELSON, Circuit Judge: The National Labor Relations Board ("the Board") seeks enforcement of its order issued against the Iron Workers Union, Local