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The Kopp-Etchells Effect
(
michaelyon-online.com
)
10 points
by
yread
on Aug 30, 2009
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1 comment
Luc
on Aug 30, 2009
[–]
A couple of theories (static discharge, piezo-electric effect, burning metal) here:
http://www.pprune.org/archive/index.php/t-88213.html
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