No. 23478. Argued June 15, 1970. Decided August 5, 1970. Mr. James C. Paradise, Cincinnati, Ohio, for petitioner. Mr. Warren Davison, Attorney, National Labor Relations Board, for respondent. Messrs. Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Robert A. Giannasi, Attorney, National Labor Relations Board, were on the brief for respondent. Messrs. George A. Leonard, Cincinnati, Ohio, Edward E. Wall, Cincinnati, Ohio