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3 In 1 Handheld Digital Oscilloscope 2.4" Display Transistor Tester Signal Generator Multi-function Scope Meter with Probe - AliExpress
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NTE Electronics NTE2355 NPN Silicon Complementary Transistor, Digital with 2 Built–in 10k Bias Resistors, 50V, 0.1 Amp: Amazon.com: Industrial & Scientific
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