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在冷兵器研究所之前的文章《刀剑真的不详吗?这个流传千年的说法竟源自一帮道士》中提到,中国古代著名的灌钢法,是生铁在上,熟铁在下 ...
使用生铁铸造的。生铁的特点是硬度大,而钢则具有韧性!用钢浇成能解决在火车转弯时减小轨道的受力,减小轮与轨之间的损伤,从而延长轨道 ...
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