https://schmetterlingladen.de/produkt/triodes-cuneifera/
Triodes cuneifera - Schmetterlingladen
Paar aus Java, Indonesien
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https://www.eurohz.com/en/product/triodes-in-metal-ceramic-and-glass/
TRIODES IN METAL, CERAMIC AND GLASS | Euro HZ - Generatori Alta Frequenza
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