In 1862, he organized the Keystone Bridge Company to buildthe first iron bridge across the Ohio River .In 1873 he establishedthe J.Edgar Thomason Steel Mill .是什么意思_In 1862, he organized the Keystone Bridge Company to buildthe first iron bridge across the Ohio River .In 1873 he establishedthe J.Edgar Thomason Steel Mill .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句