Readings show the efficient voltage based on the typical worth of samples around an entire amount of durations of the elemental frequencyPerfect for industrial electrical and electro-mechanical products troubleshooting and servicing purposes.M? th?y ng??i ch?t nh?ng ch?a ch?t là ?i?m gì? Gi?i mã gi?c m? th?y ng??i ch?t nh?ng ch?a ch?t và nh?ng