No. 77-1269. Argued October 16, 1979. Decided January 17, 1980. Thomas J. McDermott, Joseph S. Ruggie, Jr., Keith A. Ashmus, Daniel W. Hammer, Cleveland, Ohio, for petitioners. Elliott Moore, Paul Speilberg, Deputy Associate Gen. Counsel, N.L.R.B., Joseph Oertel, Washington, D.C., Bernard Levine, Director, Region 8, N.L.R.B., Cleveland, Ohio, for respondent. James F. Gill, Robinson, Silverman, Pearce, Aronsohn, Sand Berman, Michael F. O'Toole, New York City, for intervenor. Petition for review from