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Plumbing; HVAC contractor services; Maintenance of HVAC systems, plumbing installations, and refrigeration systems; Pipe laying services; Plumbing contractor services; Plumbing services

Custom design and engineering of plumbing and HVAC systems; Engineering design services; Graphic illustration and drawing services, namely, providing graphic illustrations and drawings of commercial and industrial building designs, and converting building designs or markups to electronic CAD drawings; Hydraulic engineering and design; Industrial design services