GIS electrical switch circuit breaker test equipment  
HRGKC High Voltage Switch Mechanical Features Tester
HRHLY Loop (Contacting) Resistance Tester
HBZDC Type Vacuity of the Vacuum Switch Measuring Instrument
HRDWS Type Minim Water Admeasuring Apparatus
HRLF Type High Degree of Accuracy SF6 Leak Detector
HRGKT - I type high-low voltage switchgear electrify test-bed instructions
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