direct current keying

例句：

1. 1. In the field of electronics, DC keying is used to connect components together without using a solder bridge.
   在电子领域，直流键合用于连接元件而不使用焊桥。
2. 2. The DC keying process involves connecting two wires with a small metal clip.
   直流键合过程涉及用一个小金属夹子将两根线连接起来。
3. 3. The DC keying technique has been shown to improve signal integrity and reduce electromagnetic interference.
   直流键合技术已被证明可以提高信号完整性并减少电磁干扰。