No. 74-2078. Argued April 11, 1975. Decided May 13, 1975. Modification Denied August 8, 1975. John F. Depenbrock, Atty., N.L.R.B. (Peter G. Nash, Gen. Counsel, John S. Irving, Deputy Gen. Counsel, Patrick Hardin, Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B. and Alan D. Cirker, Atty., N.L.R.B., on brief), for petitioner. George V. Gardner, Washington, D.C. (Asa Ambrister, Gardner Ambrister, Washington, D.C., on brief), for respondent. Petition from the National Labor