21 TRANSMISSION, RECEIVING, GENERATION AND REGENERATION EQUIPMENT, AND PARTS THEREFOR, FOR USE IN THE COMMUNICATION AND TELEMETERING FIELDS, AND ELECTROMECHANICAL AND SOLID-STATE ELECTRONIC DOOR-UNLATCHING DEVICES
26 TESTING, ANALYZING, MONITORING, ALARMING, AND SENSING EQUIPMENT, AND PARTS THEREFOR, FOR USE IN THE COMMUNICATION AND TELEMETERING FIELDS