coral graphite

例句：

1. 1. The coral graphite isused in the production of electronic devices.
   珊瑚石墨用于电子产品的生产。
2. 2. The graphite wasfound to have a high thermal conductivity.
   石墨被发现具有高热导率。
3. 3. Thegraphite was used as an abrasive material in the manufacturing process.
   石墨被用作制造过程中的磨料材料。