double harmonic buncher 双谐波聚束器

double harmonic map 双重调和映射

double harmonic equation 双调和方程

double harmonic oscillator approximation 双谐振子近似

2D double coupling harmonic oscillator 双模双耦合谐振子

Double rigid gear harmonic reducer 双刚轮谐波减速器

Sub harmonic Double balanced Mixers 次谐波双平衡混频器

double-layer harmonic diffractive optical element 双层谐衍射元件