This graphite could be used in its natural state for writing.
这种石墨可以在自然状态下用来书写。
2
General naturalgraphite was modified by liquid-phase oxidation method using cerium sulfate as an oxidant.
用硫酸铈作氧化剂，通过液相法将普通的天然石墨进行氧化改性。
3
Based on the practical effect, the corrosion resistant method using double layer graphite lining and natural hard rubber layer in between steel shell and graphite plate is a successful method.