graphite body

例句：

1. 1.The graphite body is used in the production of pencils and pens.
   石墨体用于铅笔和钢笔的生产。
2. 2.The graphite body was found to have a high thermal conductivity.
   研究发现，石墨体具有很高的热导率。
3. 3. The graphite body was used as a lubricant for the machine.
   石墨体被用作机器的润滑剂。