No. 17601. Argued September 16, 1969. Decided November 3, 1969. Leonard M. Wagman, N.L.R.B., Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Edward E. Wall, Atty., N.L.R.B., on the brief), for petitioner. Francis J. Leahey, Englehart, Creany, Engelhart Leahey, Ebensburg, Pa. (Eugene A. Creany, Ebensburg, Pa., on the brief), for respondents. Before BIGGS, KALODNER and FREEDMAN, Circuit Judges. OPINION OF THE COURT