Indoor television antenna mounting
作者： Frank E. Dudley
DOI:
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摘要:
lens.org 参考文章(5)
Fener Alfred, Adjustable dipole antenna unit ,(1941)
Arthur G Vogel, Fin mast antenna ,(1943)
Carter Philip Staats, Rotatable antenna system ,(1930)
George H Brown, Rotary beam antenna ,(1940)
Morrill P Mims, Directional antenna system ,(1940)