“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	mechanical-chemical hybrid sand control mechanical clamp mechanical clock mechanical comminution process to produce powder mechanical compliance mechanical composition of soil mechanical connecting technology mechanical connection mechanical construction mechanical construction techniques mechanical control circuit mechanical control measure mechanical control system mechanical coring instrument mechanical cracking mechanical creep testing machine mechanical cubature mechanical current meter mechanical damper mechanical defense mechanical dehydration mechanical dictionary mechanical digestion mechanical draft cooling tower mechanical drainage anti the slope

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。