a radio is a kind of electrical device
military_communication_device is electrical_device. radio is not communication_device. radios is devices_receive_and_emit_transmissions. radio is not wireless_communication_device. amateur_radio_equipment is radio_receiver. radio is communication_system. radio is communication_device. two_way_radio is wireless_communication_device. radio is wireless_communication_device. radio_receiver is wireless_communication_device.