electromagnetic signal box diagram

例句：

1. 1. The engineer used a special boxto capture the electromagnetic signal.
   工程师使用一个特殊的盒子来捕捉电磁信号。
2. 2. Thebox diagram helped us understand the workingsof the device.
   这个盒子图帮助我们理解了设备的工作原理。
3. 3. The engineer carefully studied thebox diagram before starting the project.
   工程师在开始项目之前仔细研究了盒子图。