Acoustic projectors, including transducers, incorporating piezoelectric, magnetostrictive, electrostrictive, electrodynamic or hydraulic elements operating individually or in a designed combination, having any of the following: Note 1: The control status of acoustic projectors, including transducers, specially designed for other equipment is determined by the control status of the other equipment.
Prazeodímium-adalékú fluorid szál erősítő (PDFFA) segítségével "optikai erősítést" hajt végre;