短語(yǔ)詞組短語(yǔ)directional Paraboloid Antenna 物面天線Directional Yagi Antenna 定向八木天線directional U antenna 定向天線directional scanning antenna 定向掃描天線Directional Bipolarization Antenna 雙極化定向天線directional E antenna 定向天線localizer directional array antenna 著陸航向信標(biāo)定向陣列天線directional HF antenna 定向高頻天線directional array antenna 引向陣列天線 返回 directional antenna