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Good job. All of them are useful!

Mark Larson, SET

Cerberus GmbH was founded in 1941. Elektrowatt did a takeover of Cerberus in 1944. Their F1 detector was developed at that time. Pyrotronics entered into a license agreement in 1954.I didn't read the article, but 1963 is a late entry into the ionization technology that had already been sold for years. Dr. E. Meili was a driving force in the development of the ion detector in my mine. Comments?

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