“letters express item”的概念、定义、翻译、参考文献-科学参考

单词	letters express item
释义	letters express item Encyclopedia 工学快件释 letters express item信件类快件以封套形式缄封的，内件是按照名址递送给特定个人或者单位的信息载体的快件。不包括书籍、报纸、刊物等。
随便看	synchrophasotron synchroscan streak camera synchroscope synchrotron synchrotron damping synchrotron damping rate synchrotron emission synchrotron instability synchrotron loss synchrotron mechanism synchrotron principle synchrotron radiation synchrotron radiation excited X-ray fluorescence spectrometry synchrotron radiation light source synchrotron radiation optics synchrotron radiation source synchrotron radiation (SR) synchrotron radiation topography synchrotron radiation X-ray diffraction analysis synchrotron radiation X-ray fluorescence synchrotron radiation X ray fluorescence analysis synchrotron radiation X-ray fluorescence (SRXRF) synchrotron self-absorption synchrotron source synchrotron spectrum

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。