“穿孔卡片”的概念、定义、翻译、参考文献-科学参考

单词	穿孔卡片
释义	穿孔卡片 Encyclopedia 管理学情报存储技术释 punched card穿孔卡片由薄纸板制成，用孔洞位置或其组合表示信息，通过穿孔或轧口方式记录和存储信息的方形卡片。
随便看	secondary thermometer secondary tillage equipment secondary tungsten resource secondary unit secondary valence secondary valence; auxiliary valence secondary valency secondary vegetation secondary vocational education secondary wall secondary water secondary water supply secondary wave secondary wavelet secondary well control technology secondary X-ray fluorescence spectrometry secondary Xray fluorescence spectrometry secondary xylem second auditory cortex second axiom of countability Second Battalion second beat second Bianchi identity second boundary condition second boundary value problem

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。