Orban, also known as Urban (died 1453), was an iron founder and engineer from Brassó, Kingdom of Hungary (today Bra?ov, Romania) who cast superguns for the Ottoman siege of Constantinople in 1453.
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。