“实质密度”的概念、定义、翻译、参考文献-科学参考

单词	实质密度
释义	实质密度 material density (人口)
随便看	bellows seal bellows sealed gate valve bellows-sealed valve bellows sealed valve bellows-type bellows-type gas flowmeter bellows-type manometer bellows-type mechanical seal bellows-type meter bellows-type pneumatic suspension bellows-type regulator bellows-type steam trap bellows valve bellow-type expansion joint bell pepper bell punch bell push button Bell receiver bell recorder bell rigging bell ringing transformer bell rod bells bell screw bell set

科学参考收录了1248194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。