No. 80-2025. March 13, 1981. William Wachter and Elaine Patrick, Attys., and William A. Lubbers, General Counsel, John E. Higgins, Jr., Deputy General Counsel, Robert E. Allen, Acting Associate General Counsel, and Elliott Moore, Deputy Associate General Counsel, N.L.R.B., Washington, D.C., for petitioner. Phillip R. Jones of Clark, West, Keller, Butler Ellis, Dallas, Tex., for respondent. Before McWILLIAMS, BARRETT, and DOYLE, Circuit Judges. McWILLIAMS, Circuit Judge. After examining the briefs