sigillary

例句：

1. 1.The signal line is essential for communication between the two cities.
   这条信号线对于两个城市之间的通讯至关重要。
2. 2. The cable was damaged during the storm, which caused a power outage.
   暴风雨期间，电缆受损导致停电。
3. 3.The engineer used a wire to connect the two pieces of equipment together.
   工程师用一根导线将两台设备连接在一起。