GDCY-20B Programmable Tsis Siv Neeg Impulse Voltage Tester feem ntau yog raws li TB / T 2653, GB / T 17627, GB / T 16927, GB14048, GB7251, GB / T 16935, IEC 61730, GB4708, GB304, GB30, GB308, GB308, GB308, GB308, GB308, GB300, GB308, GB300, GB306, GB300, GB300, GB300, GB300, GB300, GB300, GB300, GB308, GB300 kev xav tau.