Laboratory Mills, Crushers and Sieve Shakers. RETSCH is the leading solution provider for neutral-to-analysis sample preparation and characterization of solids. Based on a century of experience RETSCH develops size reduction and sieving equipment which is characterized by excellent performance, operating convenience, safety and a long lifetime.Viva ElectricCommercial. Viva Electric is the trusted electrician in Charlotte and across the Carolinas for small to mid- sized commercial electrical work. Restaurant, retail, property management and beyond. Whether in Charlotte, Greenville, Wilmington, Raleigh, or surrounding areas, Viva Electric has you covered. LEARN MORE.