短語詞組短語radar responder beacon 雷達應答標;雷達信標;雷達應答標雷達信標frequency radar responder beacon 掃描頻率雷達應答器radar responder protecting gate 衛(wèi)門fixed frequency radar responder beacon 固定頻率雷達應答標sweep frequency radar responder beacon 掃描頻率雷達應答器 返回 radar responder