Piezoelectric devices, namely, piezoelectric actuators, piezoelectric sensors, piezoelectric speakers, piezoelectric oscillators, piezoelectric switches, piezoelectric transducers, piezoelectric filters as electronic components, piezoelectric vibration detectors, piezoelectric ignitions as electronic components, piezoelectric power generators as electronic components, piezoelectric sonars, and piezoelectric microphones; Electric actuators, namely, piezoelectric actuators; piezoelectric device...