MAX232 was used innovatively in Ultrasonictransmitter and blind spots were reduced .
在超声波发射部分创新性的使用MAX232芯片，缩小盲区；
2
SK Telecom has introduced a service using a float-shaped ultrasonictransmitter, which is connected to a phone on one end and a fishing line on the other.
鲜京电信已引进一套利用浮标状超音波传输器的服务，可将传输器的一端连到手机，另一端连到钓线。
3
The entire hardware circuit is composed by ultrasonictransmitter circuit, ultrasonic receiver circuit, the power circuit, display circuit, and other modules.