n.熟铁块吹炼法
Steel was known in antiquity, and may have been produced by managing the bloomery so that the bloom contained carbon. 记者调查发现，目前在哈市，还有很多司机由于空跑和长时间等待而不愿意参与这项服务，而一些叫车的乘客也由于干等车不来等因素对这项服务并不买账。
bloomery iron 熟铁
