signal's send是什么意思

用法例句

The high efficiency and small cubage underwater acoustic transmitter is required by the battery-using underwater equipments,such as portable underwater acoustic communication equipment and small scale underwater detector.

设计并实现了一种体积小、效率高的水声信号发射机,是一些使用电池供电的水声设备(如便携式水声通信设备、便携式水下探测设备等)的关键技术。