Perfect for industrial electrical and electro-mechanical devices troubleshooting and upkeep programs. Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh)Theory: Readings show the successful voltage based upon the typical value of samples more than a whole variety of periods of the elemental frequencyOscilloscope custo