Trustees of the Electrical Workers Health and Welfare Trust;trustees of the Electrical Workers Pension Trust,plaintiffs-appellants, v. Marjo Corporation, D/b/a Desert Valley Electric, a Nevadacorporation, Grant General Contractors, Inc., a Californiacorporation; Paragon Construction, Inc., a Nevadacorporation; Weyher Bros. Co.; Tibesar Construction Co., Anevada Corporation, and Doe Corporations and Doe Individuals1 Through 5, Defendamts-appellees.trustees of the Electrical Workers Health and Welfare Trust,et al., Plaintiffs-appellants, v. Marjo Corporation, D/b/a Desert Valley Electric, a Nevadacorporation, et al., Defendants-appellees.trustees of the Electrical Workers Health and Welfare Trust;trustees of the Electrical Workers Pension Trust; Trusteesof the National Electrical Industry Fund; Members of Thejoint Apprenticeship Training Committee; National Employeesbenefit Board; Trustees of the Electrical Workers Vacationsavings Plan Trust, Plaintiffs-appellants, v. Marjo Corporation, D/b/a Desert Valley Electric, a Nevadacorporation; Grant General Contractors, Inc., a Californiacorporation; Paragon Construction, Inc., a Nevadacorporation; Tibesar Construction Co., a Nevadacorporation, and Doe Corporations and Doe Individuals 1through 5, Defendants-appellees, 979 F.2d 856 (9th Cir. 1993)