37 Construction, repair, and consulting services in the field of sensor systems, measurement equipment, and gauges; Consulting on installation and repair of hardware in the field of shipbuilding, building industrial facilities, and building computing facilities; Cleaning and flushing in the field of sensor systems, gauges, piping, gas system instrumentation, compressed gas systems, self-contained breathing apparatus (SCUBA), o-rings, filters, and breathing devices ; Maintenance and repair of breathing equipment, sensor systems, measurement equipment, and gauges; Maintenance and repair of equipment on ships; Technical support services, namely, technical advice related to the repair of sensor systems, measurement equipment, and gauges