No. 80-1603. Argued January 18, 1982. Decided March 1, 1982. Thomas H. Barnard, Gregory B. Scott, Squire, Sanders Dempsey, Cleveland, Ohio, for petitioner. Elliott Moore, Deputy Associate Gen. Counsel, David Marshall, N.L.R.B., Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before EDWARDS, Chief Judge, BROWN, Circuit Judge, and COHN, District Judge. Honorable Avern Cohn, United States District Judge for the Eastern District of Michigan, sitting by designation