piezoelectric sender

例句：

1. 1. The piezoelectric sender is used to transmit signals through the air.
   压电发送器用于通过空气传输信号。
2. 2. The piezoelectric sender was developed by a team of engineers.
   压电发送器是由一组工程师开发的。
3. 3. The piezoelectric sender can be used in many applications, including medical and industrial fields.
   压电发送器可以在许多应用领域中使用，包括医疗和工业领域。