Wilmerding-based Wabtec Corp. said Monday it has completed the acquisitions of two companies, Unitrac Railroad Materials and Pride Bodies. The two companies are both in the railroad track business, with Unitrac manufacturing parts of railroad tracks and Pride Bodies in the gear, crane and system business. The companies had sales of about $45 million last year, but a price was not disclosed for either company. "Railroads in the U.S. spend up to 70 percent of their capital on infrastructure, and...