基本解释[经济学]冷铸铁词组短语短语cold -blast pig iron 冷铸铁;冷风生铁white cold -blast pig iron 冷风白口铁cold blast pig iron 冷风高炉生铁;冷风生铁white cold blast pig iron 冷风白口铁专业释义经济学冷铸铁