preamkplifiatonpreamplificationpreamplifier前: front大: big; large前置放大級: preliminary amplifying stage前置放大器: front end amplifier; ha head amplifier; haheadamplifier; hd head amplifier; per amplifier; pre amplifier; pre-amplifier=preamplifier; preamplifier (preamp); preampreamplifier; prime amplifier光前置放大板: optical preamplifier opa下載手機詞典可隨時隨地查詞查翻譯