G PHYSICS
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G01 MEASURING; TESTING
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G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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G01R19/00 Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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G01R19/25 using digital measurement techniques
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G01R19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
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