Nos. 97-1417, 97-1418 Argued April 9, 1998 Decided June 26, 1998 On Petitions for Review and Cross-Application for Enforcement of Orders of the National Labor Relations Board Vincent J. Apruzzese argued the cause and filed the briefs for petitioner. David A. Fleischer, Senior Attorney, National Labor Relations Board, argued the cause for respondent. With him on the brief were Linda Sher, Associate General Counsel, and Aileen A. Armstrong, Deputy Associate General Counsel. Margaret A. Gaines, Supervisory