FNIRSI Wall Scanner - test and what's inside
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FNIRSI Radiation Detector - unboxing, test, teardown
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What's inside a UPS
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Finally! A Tumbler That Destroys the Stanley!
16:04
Fnirsi SG-004A signal generator test and what's inside
2:56
Дозиметр-радіометр побутовий МКС-05 Терра-П+
19:36
Fnirsi S1 smart multimeter test and what's inside
22:11
Failed 24V 10A power supply repair
27:15