No. 16996. April 7, 1967. Clarice Feldman, 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., Washington, D.C., on brief, for petitioner. David E. Burgess, Detroit, Mich., MacFarlane, Tolleson, Burgess Mead, Robert D. Welchli, Detroit, Mich., on brief, for respondents. Before O'SULLIVAN and PHILLIPS, Circuit Judges, and CECIL, Senior Circuit Judge. CECIL, Senior