Use "radiotelegraphy" in a sentence

1. The licence allows the user to make radiotelegraphy (Morse code) and radiotelephony transmission in 12 frequency bands.

2. Transducers for telecommunication microphones, loudspeakers, microphone amplifiers, radiotelephony apparatus, telecommunications apparatus, radiotelegraphy apparatus, electro-acoustic apparatus

3. This document indicates the changes to the frequency bands allocated exclusively to the Maritime Mobile Radiotelegraphy Service.