The white sandstone can endure more than3000 degrees high temperatures, they are the good fireproof materials which the smelting, casting use.
白砂岩，能耐3000多度以上的高温是冶炼、造用的耐火好材料。
The white sandstone can endure more than 3000 degrees high temperatures, they are the good fireproof materials which the smelting, casting use.
白砂岩，能耐3000多度以上的高温是冶炼、铸造用的 耐火好材料。
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