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Electrical testing|Varistors|Semiconductor resistors|Rated current|Testing conditions|Quality|Marking|Electrical equipment|Performance testing|Rated voltage|Assessed quality|Surge limiters|Ratings|Quality control|Dimensions|Performance|Endurance testing|Approval testing|Voltage|Resistors|Quality assurance systems|Inspection|Specification (approval)|Electrical protection equipment|Surge protection|Qualification approval|Environmental testing|Leakage currents|Electronic equipment and components