Nos. 79-1502, 80-1126. Argued November 11, 1980. Decided January 8, 1982. L. Gray Geddie, Jr., Greenville, S.C. (Homer L. Deakins, Jr., Martha C. Perrin, Ogletree, Deakins, Smoak, Stewart Edwards, Greenville, S.C., on brief), for petitioner. Robert Tim Brown, Asst. Gen. Counsel, New York City (Arthur M. Goldberg, Gen. Counsel, Joel Ronald Ax, Deputy Gen. Counsel, New York City, on brief), for intervenor. W. Christian Schumann, N.L.R.B., Washington, D.C. (William A. Lubbers, Gen. Counsel, John E.