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History & Trivia / Radioactive Spark Plugs (ca. 1940s)
« Last post by Marlin on Today at 02:23 PM »Radioactive Spark Plugs (ca. 1940s)
https://orau.org/health-physics-museum/collection/consumer/miscellaneous/spark-plugs.html
https://orau.org/health-physics-museum/collection/consumer/miscellaneous/spark-plugs.html