“longitudinal quadrupole”的概念、定义、翻译、参考文献-科学参考

单词	longitudinal quadrupole
释义	longitudinal quadrupole [´län·jǝ`tüd·ǝn·ǝl `kwäd·rǝ´pōl] ^ACOUSTICS A sound source resulting from a variation of a component of the velocity of matter in a direction parallel to the velocity component. ^{ELECTROMAGNETISM} An electric or magnetic quadrupole which produces a field equivalent to that of two equal and opposite electric or magnetic dipoles separated by a small distance parallel to the direction of the dipoles. Also known as axial quadrupole.
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