本发明结构合理，可有效减小石墨电极的热膨胀，提高石墨电极的抗热冲击性。
The invention has a reasonable structure, can effectively reduce the thermal expansion of the graphite electrode and improve the thermal-shock resistance of the graphite electrode.
本发明结构合理，可有效减小石墨电极的热膨胀，提高石墨电极的抗热冲击性。
The invention has a reasonable structure, can effectively reduce the thermal expansion of the graphite electrode and improve the thermal-shock resistance of the graphite electrode.
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