压电信号和声传感器PKB24SPCH3601 piezo transducer 3.6 kHz 24.3 mmPKM13EPYH4002 piezo transducer 4 kHz 12.6 mmPKM17EPPH4001 piezo transducer 4 kHz 17 mmPKM22EPPH2001 piezo transducer 2 kHz 22 mmPKM22EPPH4007 piezo transducer 85 dB/10 cm 4 kHz 22 mm该类别中所有 (6)