No. 530, Docket 34152. Argued March 17, 1970. Decided June 2, 1970. Janet Carol McCaa, N.L.R.B., Washington, D.C. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, William Wachter and Stephen J. Solomon, Attorneys, N.L.R.B., Washington, D.C., of counsel), for petitioner. Joseph S. Rosenthal, New York City (Friedlander, Gaines, Ruttenberg Goetz, New York City, of counsel), for respondent. Before MOORE and FEINBERG, Circuit