英语词汇certificate of mailing怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

英汉双解词典包含3607232条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

单词	certificate of mailing
释义	certificate of mailing
随便看	traveling,travelling traveling unloader traveling valve traveling water screen traveling wave traveling wave accelerator traveling wave aerial traveling wave amplifier traveling wave coefficient traveling wave electron linac traveling wave excitation traveling waveguide traveling wave klystron traveling wave line traveling wave linear accelerator traveling wave maser traveling wave measurement traveling wave oscillation traveling wave photomultiplier traveling wave phototube traveling wave protection traveling waves confinement traveling wave theory Traveling wave tube traveling wave type accelerator guide