... :1, using phase-locked PLL frequency automatic tracking technology, without FM.2, using the German piezoelectric ceramic ... products industry.Company Brief IntroduceDongguan BRDASON Ultrasonic Equipment Co.,Ltd has been dovoted in the design, manufacturing and ... of fine domestic and foreign suppliers: Foxconn , Jing Cheng Technology Group (GBM), molex, Vtech , Samsung Electronics, the East together ...