主要介绍了煤沥青粉填充环氧防腐涂料的制备方法.
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The process of coal tar steelmaking in special steel open hearth is described in this paper.
介绍了特钢平炉煤焦油炼钢工艺.
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几位身穿白色水手服,身材高挑儿的礼仪小姐站在只有几摞纸的资料台前相互交头接耳。
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The heavy paper impregnated with tar is used as part of a roof for waterproofing.
这种用焦油浸泡的重磅纸通常用作屋顶材料,用来防水.
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