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title=Tektronix 321 | | title=Tektronix 321 | | ||
summary=Portable single channel scope | | summary=Portable single channel scope | | ||
image= | image=Tek 321 trace.jpg|321 front view | | ||
caption=Tek 321 front | | caption=Tek 321 front | | ||
introduced=1960 | | introduced=1960 | |