i made that
i made that in like 2006 with bailing wire as a core which was wound on an empty roll of PTFE sealing tube and it was certainly directional.
Frequency changed when the thing was moving which i had never seen before.
i made that in like 2006 with bailing wire as a core which was wound on an empty roll of PTFE sealing tube and it was certainly directional.
Frequency changed when the thing was moving which i had never seen before.
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