fluctuation nnoise level
起伏噪声电平

• daylight illuminaton
• daylight lamp
• day-light ratio
• daylight tyep colour film
• dayligth effect
• day/night sight
• day range
• dayteim transparency
• daytime radiance
• daytime sensitivity
• daytim resolution
• dazzle
• db-loss
• dBm
• DC are source
• DC-excited
• DC-excited Ar-ion laser
• DC magnetization technique
• DC-pumped
• deactivation
• dead axle
• dead band
• dead beat
• dead point
• dead pulley