electrotechnical carbon

例句：

1. 1.The new electronic device uses electrotechnical carbon as its main component.
   这款新型电子设备主要使用电子技术碳作为其主要成分。
2. 2.The development of electrotechnical carbon has greatly improved the efficiency of energy conversion.
   电子技术碳的发展极大地提高了能源转换的效率。
3. 3.The use of electrotechnical carbon in electronic devices is becoming increasingly popular.
   在电子设备中使用电子技术碳越来越受欢迎。