AD603, a variable-gain amplifier, is used in the pre-amplifier circuit for restraining the back scattering and amplifying the laser signal of target.是什么意思_AD603, a variable-gain amplifier, is used in the pre-amplifier circuit for restraining the back scattering and amplifying the laser signal of target.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句