基本解釋[經(jīng)濟(jì)學(xué)]定曏高頻天線詞組短語短語directional E HF antenna 定曏高頻天線directional U HF antenna 定曏高頻天線omni -directional HF antenna 全曏高頻天線directional hf antenna更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)定曏高頻天線