41753169079241_page_168

41753169079241 | page 168 | https://thedailydialectics.com/pdfs/FIOA/41753169079241/41753169079241.pdf

a single practical system known to be given serious consideration, t no attempt is made to conceal thy dignal from an ordinary receiver. The reason for this is that the advantages claimed by the designers are not concealment, but rather,[ features, 2. Several groups are studying and dgyeloping…