The holes are only borings, less than a foot in diameter.
油井僅僅是一些鉆孔, 其直徑不到一英尺.
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These borings consist of rock fragments, ash coal and other materials.
這些孔屑包括石頭碎片 、 灰塵、煤渣和其他東西.
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Based on thermodynamics principle, the feasibility for melting iron borings in cupola was ana lysed.
從熱力學(xué)角度分析了在沖天爐內(nèi)熔煉鑄鐵切屑的可行性.
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