No. 89-70054. Argued and Submitted November 16, 1989. Decided July 5, 1990. As Amended on Denial of Rehearing August 29, 1990. Frederick Havard, N.L.R.B., Washington, D.C., for petitioner. J. Richard Thesing, Menlo Park, Cal., for respondent. Petition to Review a Decision of the National Labor Relations Board. Before SCHROEDER, NELSON and WIGGINS, Circuit Judges. SCHROEDER, Circuit Judge: In this unusually protracted labor relations controversy, the National Labor Relations Board seeks enforcement