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| Bessemer process; Bessemer process (The L-D process combines the low capital cost and high speed of operation of the Bessemer process with the high product quality of the open-hearth. L-D 炼钢法将贝塞麦炼钢法的投资费用低、生产速度快和平炉炼钢的产品质量高等优点集于一身。) | |||
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