Nos. 96-1786, 96-1934. Argued April 7, 1997. Decided May 14, 1997. On Petition for Review and Cross-Application for Enforcement of an Order of the National Labor Relations Board. (32-CA-12887) ARGUED: Warren Malcolm Davison, Littler, Mendelson, Fastiff, Tichy Mathiason, Baltimore, MD, for Petitioner. Julie Brock Broido, National Labor Relations Board, Washington, DC, for Respondent. ON BRIEF: Frederick L. Feinstein, General Counsel, Linda Sher, Associate General Counsel, Aileen A. Armstrong, Deputy