fine graphite

例句：

1. 1. The engineer usedfine graphite to make the machine parts.
   工程师使用细石墨制作机器零件。
2. 2. Finegraphite is often used in the productionof electrical equipment.
   细石墨常用于生产电气设备。
3. 3. The graphite was refined fromthe raw material before being used in themanufacturing process.
   在制造过程中，石墨是从原材料中提炼出来的。