No. 75-1914. Argued June 1, 1976. Decided September 1, 1976. Timothy K. Carroll, Detroit, Mich., for petitioner. Elliott Moore, Deputy Assoc. Gen. Counsel, Eric Moskowitz, Michael S. Winer, Attys., N.L.R.B., Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before PELL, SPRECHER and BAUER, Circuit Judges. PELL, Circuit Judge. The issues presented in this case by the petition of Advance Industries Division-Overhead Door Corporation (Company) for review