42 Research and development services, namely, design of drilling rigs, service rigs and accessories, namely, automated catwalks, automated power tong, power swivel top drives, tool carriers, coil tubing injectors, pipe handlers, tubing loaders, trailerized mud trucks, walking matts, crew facilities, namely, a trailer, temporary shelter and other temporarily located mobile structure, used by the rig crew for changing clothing, as a meeting place for job safety assessment meetings, as a lunch room, and having toilet facilities, deck trucks and containerized tool and storage sheds