“平常信函”的概念、定义、翻译、参考文献-科学参考

单词	平常信函
释义	平常信函 Encyclopedia 工学信函释 ordinary letter平常信函信函的一种常见形式。邮政企业在收寄时不出具收据，处理时不登记，投递时不要求收件人签收，不接受用户查询。简称平信。
随便看	Irrigation and Drainage Rules of the North Song Dynasty irrigation and drainage station of electric engineering irrigation and fertilization machinery irrigation area irrigation areas in China irrigation canal system irrigation date irrigation development planning irrigation district management organization irrigation duty irrigation efficiency irrigation emitter irrigation engineering operation and maintenance irrigation experiment irrigation grass industry irrigation information irrigation law irrigation layout plan irrigation machinery irrigation management irrigation method and technology experiment irrigation mode of pasture irrigation principle irrigation program irrigation program experiment

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。