[电] neutralized radio frequency am-plifier

zhōng hé shè pín fàng dà qì ㄓㄨㄥ ㄏㄜˊ ㄕㄜˋ ㄆㄧㄣˊ ㄈㄤˋ ㄉㄚˋ ㄑㄧˋ