词汇	The double step drum
释义	The double step drum 双阶梯卷筒
随便看	phase-frequency distortion corrector phase-frequency distribution phase-frequency electronic scanning phase-frequency equalization phase-frequency equalizer phase frequency measurement method phase frequency response phase-frequency response phase frequency response characteristic phase-frequency scanned array phase-frequency skip phase frequency spectrum phase-frequency spectrum phase frequenty detector phase Fresnel lens phase front Phase Front Disturbance phase front velocity phase-front velocity phase function phase functions Phase,G0 Phase,G1 Phase,G2 phase gain