No. 93-1357. Argued November 8, 1994. Decided December 16, 1994. Petition for Review of an Order of the National Labor Relations Board. Mark G. Arnold, St. Louis, MO, argued the cause and filed the briefs for petitioner. William M. Bernstein, Atty., N.L.R.B., Washington, DC, argued the cause for respondent. With him on the brief were Linda R. Sher, Acting Associate Gen. Counsel, and Aileen A. Armstrong, Deputy Associate Gen. Counsel, N.L.R.B., Washington, DC. Before WALD, GINSBURG and TATEL, Circuit