No. 13303. February 17, 1953. George J. Bott, Gen. Counsel, David P. Finding, Associate Gen. Counsel, A. Norman Somers, Asst. Gen. Counsel, Elizabeth W. Weston and Abraham Siegel, Attys., N.L.R.B., Washington, D.C., for petitioner. Gardiner Johnson, Thomas E. Stanton, Jr., San Francisco, Cal., for respondents Swinerton, Jabez Burns Sons, and others. Before DENMAN, Chief Judge, and HEALY and ORR, Circuit Judges. ORR, Circuit Judge: The National Labor Relations Board seeks enforcement of an order requiring