natural graphite

例句：

1. 1. This type of graphite is used in the production of electrical components.
   这种类型的石墨用于生产电气组件。
2. 2.The graphite was extracted from the mineral deposits in the region.
   石墨是从该地区的矿床中提取出来的。
3. 3. The graphite has a high thermal conductivity, making it ideal for use in heat exchangers.
   石墨具有高热导率，因此非常适合用于换热器。