The holes are only borings, less than a foot in diameter.

油井仅仅是一些钻孔, 其直径不到一英尺.

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These borings consist of rock fragments, ash coal and other materials.

这些孔屑包括石头碎片 、 灰尘、煤渣和其他东西.

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Based on thermodynamics principle, the feasibility for melting iron borings in cupola was ana lysed.

从热力学角度分析了在冲天炉内熔炼铸铁切屑的可行性.

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