At one time I had read about some development going on to create sparkplugs=
 that "look" inside the combustion chamber of an internal combustion engine=
..

Intergoogle does not reveal any information about this concept.

Is anyone aware of sparkplugs that ......
#1 provide an optical window
#2 measure pressure
#3 measure temperature
#4 measure some other magical metric........

99guspuppet
--=20
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