要不要也谈谈质量？那种土法上马炼出的钢能派上用场吗？很长一段时间国内进口大量美国的建筑边角料钢材，比从矿石炼钢还是划算

来源: 立竿见影-1 于 2022-11-24 19:27:23 [旧帖] [给我悄悄话] 本文已被阅读：次

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