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File:Sectionalized transistor besides an ordinary paper clip – Bell Telephone Magazine (Spring 1950, p. 22) (14568400179).jpg - Wikimedia Commons
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TO-220 Clip-On Heatsink : ID 977 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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5pcs TO220246 Ferrule encapsulation radiator Steel spring clip heatsink MOS transistor schottky chip clip 18*8*8*0.4 TO247/3P
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