基本解释[經濟學]外反餽式磁放大器词组短语短語external l feedback magnetic amplifier 外反餽式磁放大器external crack feedback magnetic amplifier 外反餽式磁放大器external feedback type magnetic amplifier 外反餽形磁放大器external feedback magnetic amplifier更多词组专业释义經濟學外反餽式磁放大器