waveguide critical dimension

例句：

1. 1.The waveguide is used to transmit radiowaves.
   波导用于传输无线电波。
2. 2. Thewaveguide is essential for the operation ofthe communication system.
   波导对于通信系统的运行至关重要。
3. 3. The waveguide is designed tominimize distortion in the transmission ofsignals.
   波导设计成最小化信号传输中的失真。