electronic components& instruments including air ultrasonic/ underwater ultrasonic/ bolt-
clamped high power/ ultrasonic atomizing transducers, air ultrasonic proximity/ piezoelectric
film/ blood pressure sensors, pyroelectric infrared sensors & frensnel lens glass break detectors,
audio transducers & buzzers & elements, piezoelectric ceramic elements, piezoelectric ceramic
sirens, ultrasonic contact lens cleaners, ultrasonic novelties.