Nos. 87-6354, 88-5066. Argued October 21, 1988. Decided January 13, 1989. Frank H. Stewart (argued), Taft, Stettinius and Hollister, Timothy P. Reilly, Michael C. Lueder, Cincinnati, Ohio, for petitioner, cross-respondent. Robin Alexander, Pittsburgh, Pa., for intervenor. Aileen A. Armstrong, Deputy Associate Gen. Counsel, N.L.R.B., Peter Winkler, Scott MacDonald (argued), Washington, D.C., for respondent, cross-petitioner. Petition for review from the National Labor Relations Board. Before MERRITT