“photoelectric retrieval tool”的概念、定义、翻译、参考文献-科学参考

单词	photoelectric retrieval tool
释义	photoelectric retrieval tool Encyclopedia 管理学光电式检索工具释 photoelectric retrieval tool光电式检索工具以文献缩微品作为文献库，利用光学、电学手段或设备从中查找信息的一种机械检索工具。又称缩微式检索工具。
随便看	principle of the conservation of molecular orbital symmetry principle of the point of accumulation principle of the unattainability of absolute zero principle of the unification of subjectivity and objectivity principle of timely recovery principle of time value of money principle of transference principle of transfinite induction principle of translation criticism principle of treatment principle of trivalence principle of ubiquity of diachronism principle of uniform boundedness Principle of uniformity of temperature difference field principle of uninterrupted trial principle of unity and sequentiality of educational influence principle of unity of knowledge and practice principle of universal suffrage principle of using native language principle of utmost good faith Principle of Valuable Idea Principle of Vectoring principle of velocity potential superposition principle of virtual displacement principle of virtual displacements

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