“Bronze Gun with the Inscription“Tianzi”of the Yongle Reign,Ming Dynasty”的概念、定义、翻译、参考文献-科学参考

单词	Bronze Gun with the Inscription“Tianzi”of the Yongle Reign,Ming Dynasty
释义	Bronze Gun with the Inscription“Tianzi”of the Yongle Reign,Ming Dynasty Encyclopedia 历史学中国古代科技文物释 Bronze Gun with the Inscription“Tianzi”of the Yongle Reign,Ming Dynasty明永乐“天字”铜手铳中国明代永乐十九年（1421）制轻型火铳。
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科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。