No. 17546. Argued May 9, 1969. Decided June 11, 1969. Joseph Yablonski, N.L.R.B., Washington, D.C. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, Elliott Moore, Attorney, N.L.R.B., on the brief), for petitioner. Milford Salny, Netcong, N.J., for respondents. Before McLAUGHLIN, KALODNER and VAN DUSEN, Circuit Judges. OPINION OF THE COURT VAN DUSEN, Circuit Judge. This case is before us on a petition for enforcement of the