adj. quarter-wave
利用四分之一波长转换器原理，结合填充材制成电磁波吸收体。
By a quarter of wave length commutator principle, combining with electromagnetic wave absorb of filling material.
本文提出了推导非四分之一波长膜系反射镜吸收率的另一种方法。
In this paper another method is employed to derive the expression for the absorptance of non quarter wave systems.
本文针对抑制液体火箭发动机不稳定燃烧的声学装置——赫姆·霍兹声腔和四分之一波长管声腔进行了研究。
Helmholtz resonators and quarter wave resonators are studied as the high frequency combustion instabilities suppression devices in liquid rocket engines.
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