No. 87-7056. Argued and Submitted August 11, 1987. Decided February 9, 1988. Paul J. Spielberg, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., for petitioner. Neil Vincent Wake, Michael R. Devitt, Mark C. Dangerfield, Beus, Gilbert, Wake Morrill, Phoenix, Ariz., for respondent. On Application for Enforcement of an Order of the National Labor Relations Board. Before CHAMBERS, SCHROEDER and POOLE, Circuit Judges. POOLE, Circuit Judge: The National Labor Relations Board petitions for enforcement