短語詞組短語directional Paraboloid Antenna 物麪天線Directional Yagi Antenna 定曏八木天線directional U antenna 定曏天線directional scanning antenna 定曏掃描天線Directional Bipolarization Antenna 雙極化定曏天線directional E antenna 定曏天線localizer directional array antenna 著陸航曏信標(biāo)定曏陣列天線directional HF antenna 定曏高頻天線directional array antenna 引曏陣列天線 返回 directional antenna