短語(yǔ)詞組短語(yǔ)beam -scanning 波束可調(diào)的E -Beam Scanning 電子束掃描法electron -beam film scanning 膠片電子束掃描錄像Ion beam conical scanning system 發(fā)明名稱light beam scanning 光束掃描electro beam scanning 電子束掃描antenna beam scanning 天線波束掃描 返回 beam scanning