“明永乐“天字”铜手铳”的概念、定义、翻译、参考文献-科学参考

单词	明永乐“天字”铜手铳
释义	明永乐“天字”铜手铳 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。
随便看	ballast distributing and profiling machinery ballastless ballastless track ballastless track on turnout section ballast resistor ballast resistor, barretter ballast track Ball Bearing ball clay ball dance Balleny Islands Ballerina on the Boat Ballet ballet costume and shoe ballet in Europe balleting Ballets Russes Balletto ball exercise ballgame fan ball grid array ball grid array, BGA ball grinding process ball hardness testing machine Ballik-Ramsay band

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。