Nos. 91-1314, 91-1317. Argued September 8, 1993. Decided March 25, 1994. Petitions for Review and Cross-Petitions for Enforcement of an Order of the National Labor Relations Board. Michelle Dunham Guerra, argued the cause and filed the briefs, for petitioners in No. 91-1314. A.E. Lawson entered an appearance. Martin Wald, argued the cause and filed the briefs for petitioner in No. 91-1317. Margaret E. Luke, Atty., N.L.R.B., argued the cause, for appellee. With her on the brief, were Aileen A. Armstrong

No. 84-7356. Argued and Submitted February 11, 1985. Decided May 13, 1985. David A. Rosenfeld, Van Bourg, Weinberg, Roger Rosenfeld, San Francisco, Cal., for petitioner. Kathleen Murray, Elliott Moore, N.L.R.B., Washington, D.C., for respondent. James A. Carter, San Francisco, Cal., for intervenor. On Petition to Review an Order of the National Labor Relations Board. Before KENNEDY, ALARCON and NELSON, Circuit Judges. NELSON, Circuit Judge: International Association of Machinists and Aerospace Workers