In microwave circuit and aerial system, impedance matching is very important.
在微波电路和天线系统中，阻抗匹配是十分重要的问题。
2
This circuit has made a success in watching the running of the aerial railway, with the qualities of simple circuit structure, fine properties, low cost and practical value.
该电路能实现对架空索道运行状态的监控，电路结构简单、性能高、成本低，具有实用价值。
3
Reliability of emergent stop circuit of aerial platforms can be raised by using "cut off" stoppage.