Nos. 76-1135, 76-1401. Argued August 25, 1976. Decided September 29, 1976. David F. Zorensky, Atty., N.L.R.B., Washington, D.C. (John S. Irving, Jr., Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., on brief), for petitioner in No. 76-1135 and for respondent in No. 76-1401. Robert A. Valois, Raleigh, N.C. (Frank P. Ward, Jr., Maupin, Taylor Ellis, Raleigh, N.C., on brief), for respondent in No. 76-1135 and for petitioner