No. 72-1518. Argued December 6, 1972. Decided August 30, 1973. Paul M. Thompson, Richmond, Va. (Francis V. Lowden, Jr., Hill B. Wellford, Jr., and Hunton, Williams, Gay Gibson, Richmond, Va., on brief), for petitioner. Bruce McLean, Atty., N.L.R.B. (Peter G. Nash, Gen. Counsel, Patrick Hardin, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Robert A. Giannasi, N.L.R.B., on brief), for respondent. Petition for review from the National Labor Relations Board. Before BOREMAN, Senior Circuit