ELECTROTECHNICAL APPARATUS, INSTRUMENTS AND COMPONENTS, namely, COAXIAL CONNECTORS, COMBINED COAXIAL DEVICES, PATCH PANELS, COMBINERS, [ MATRIX SWITCHES, ] COAXIAL MEASURING DEVICES, LOADS, CALIBRATION KITS, ATTENUATORS, DIRECTIONAL COUPLERS, FILTERS, JUMPER CABLES, ROTARY JOINTS, SLIPRING DEVICES, [ SLIPRING ASSEMBLIES, ] SWITCHES [, RELAYS ] ; OPTICAL DATA TRANSMISSION APPARATUS, INSTRUMENTS AND COMPONENTS, namely, FIBER OPTIC CONNECTORS [, COMBINERS, SWITCHES, COUPLERS, CALIBRATION KITS, ATTENUATORS, MEASURING DEVICES ]