COMMUNICATIONS EQUIPMENT, NAMELY, COMMUNICATION SYSTEMS HAVING RADIOS, DESK CONSOLES, INTERFACES, WIRELESS UNITS, MASTER CONTROLS AND PARTS THEREOF FOR USE WHERE ENERGY TRANSMISSION IS LIMITED BY NATURAL AND/OR MAN-MADE BARRIERS SUCH AS ROCKS AND/OR STEEL REINFORCED WALLS AND/OR WHERE THE TRANSMISSION ENERGY IS LIMITED BY SAFETY CONSIDERATIONS SUCH AS IGNITION AVOIDANCE OF METHANE IN COAL MINES
Electrical and Scientific Apparatus