No. 95-1992 Heard May 8, 1996 June 25, 1996 Girard R. Visconti, with whom Visconti Boren Ltd. was on brief, for petitioners. Corinna L. Metcalf, Attorney, National Labor Relations Board, with whom Frederick L. Feinstein, General Counsel, Linda Sher, Associate General Counsel, Aileen A. Armstrong, Deputy Associate General Counsel, Charles Donnelly, Supervisory Attorney, and Joseph J. Jablonski, Jr., Attorney, National Labor Relations Board, were on brief, for respondent. On Petition for Review and