短語(yǔ)詞組短語(yǔ)rectangular comb filter 矩形梳式濾波器rectangular waveguide filter 矩形波導(dǎo)濾波器qualitative grade rectangular filter sheets 方形定性濾紙rectangular low -pass filter 矩形低通濾波器rectangular waveguide low -pass filter 矩形波導(dǎo)低通濾波器 返回 rectangular filter