Changzhou Qisheng Electronics Componet Factory is specially engaged in researching and manufacturing of piezoelectric ceramic components and devices. It is the best manufacturing company of piezoelectric acoustic transducer devices with the highest quality,the most kinds and the biggest scales.Its output of the thin piezoelectric ceramic buzzer is 10 millions each year.It can batch produce other piezoelectric trancducer devices.such as ultrasonic sensor,ceramic filter &resonator and high power ultrasonic transducer,etc.The company owns high efficient materials manufacturing facilities, advanced test equipment and perfect...