No. 82-2117. Argued May 17, 1983. Decided June 7, 1983. As Amended June 7, 1983. Robert L. Hobbins, Minneapolis, Minn., for petitioner. Allison W. Brown, Jr., Attorney, N.L. R.B., Washington, D.C., for respondent. Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., was on the brief for respondent. Petition for Review of an Order of the National Labor Relations Board/Cross-Application for Enforcement of an Order. Before EDWARDS, Circuit Judge, MacKINNON, Senior Circuit Judge