... 标准型耐火砖standard size refractory brick 泡砂石quartzite sandstone 酸性耐火材料acid refractory [material] ...
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We're able to provide granite, marble, SLATE, sandstone, quartzite, li.
我们能够提供花岗岩，大理石，板岩，砂岩，石英岩，李。
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This rock formation is made of white-gray quartzite, a kind of sandstone.
VOA: special.2009.07.20
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