400 U.S. 297 91 S.Ct. 402 27 L.Ed.2d 398 NATIONAL LABOR RELATIONS BOARD, Petitioner,v.LOCAL 825, INTERNATIONAL UNION OF OPERATING ENGINEERS, AFL-CIO. BURNS AND ROE, INC., et al., Petitioners, v. LOCAL 825, INTERNATIONAL UNION OF OPERATING ENGINEERS, AFL-CIO. Nos. 40, 42. Argued Nov. 18, 1970. Decided Jan. 12, 1971. Syllabus A general contractor (Burns) subcontracted construction […]