No. 73-2068. Argued September 6, 1974. Decided November 14, 1974. H. David Rothman, Pittsburgh, Pa., for petitioner. William H. DuRoss, III, Atty., Peter G. Nash, Gen. Counsel, John S. Irving, Deputy Gen. Counsel, Patrick Hardin, Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before SEITZ, Chief Judge, and GIBBONS and GARTH, Circuit Judges. OPINION OF THE COURT GARTH, Circuit Judge