down-converter
(down-convertor)下换器，降频转换器

• chrominance primary
• chrominance response
• chrominance Signal
• chrominance subcarrier
• chrominance vector
• chrominum
• chromising
• chromium ion
• chromium oxide
• chromogen
• chromogenic
• chromogenic reaction
• chromogenic reagent
• chromo-isomerism
• chromo-kisomer
• chromometer
• chromometry
• chromo-optometer
• chromophore
• chromophoric Electrons
• chromophoric group
• chromo-photograph
• chromophotometer
• chromophtography
• chromoscan