土状石墨分类：

1.土状石墨

2.耐火材料

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耐火材料
Rafractory Material
1.高铝质耐火砖 High-Aluminum Refractory Bricks	3.高铝质衬砖 High-Aluminum Lining Bricks
2.镁碳砖 Magnesia Carbon Bricks	4.异型高铝砖 Special-shaped High-Aluminum Bricks