HOUSE MARK FOR A LINE OF TRANSIENT AND VOLTAGE SURGE SUPPRESSORS; POWER FILTERS FOR SUPPRESSING TRANSIENT VOLTAGES AND ATTENUATING HIGH-FREQUENCY NOISE ON POWER CIRCUITS WITHIN ELECTRONIC PRODUCTS AND THROUGHOUT BUILDING ELECTRICAL DISTRIBUTION SYSTEM; POWER HARMONIC CANCELLATION APPARATUS FOR MINIMIZING NON-ZERO NEUTRAL CURRENTS IN MULTI-PHASE POWER DISTRIBUTION SYSTEMS; ELECTRICAL AND ELECTRONIC TEST EQUIPMENT FOR TESTING THE CONDITION OF TRANSIENT AND VOLTAGE SURGE SUPPRESSORS, POWER FILTERS, AND POWER HARMONIC CANCELLATION APPARATUS

'apparatus':39,75 'attenu':19 'build':32 'cancel':38,74 'circuit':26 'condit':62 'current':46 'distribut':34,52 'electr':33,54 'electron':28,56 'equip':58 'filter':13,70 'frequenc':22 'harmon':37,73 'high':21 'high-frequ':20 'hous':1 'line':5 'mark':2 'minim':41 'multi':49 'multi-phas':48 'neutral':45 'nois':23 'non':43 'non-zero':42 'phase':50 'power':12,25,36,51,69,72 'product':29 'suppress':15 'suppressor':11,68 'surg':10,67 'system':35,53 'test':57,60 'throughout':31 'transient':7,16,64 'voltag':9,17,66 'within':27 'zero':44

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