Granite as raw material,PSA is made in a series of aggregat e reactions of chemical fusibility.
选用花岗闪长岩为原料,通过一系列反应制成新型絮凝剂--硅酸铁铝盐絮凝剂。
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Well, the stone is a kind of very hard rock called granodiorite. It is dark grey and pink in color.
石碑由硬的岗闪成。石碑的颜色为深灰色和粉色。
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