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|summary=4 MHz oscilloscope | |summary=4 MHz oscilloscope | ||
|image=Tek_310A_front.jpg | |image=Tek_310A_front.jpg | ||
|caption=Tektronix | |caption=Tektronix 310A,front view | ||
|introduced=1955 | |introduced=1955 | ||
|discontinued=1972 | |discontinued=1972 |