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instrument for measurement in a polyphase system and arranged for connection to more than one phase of system, mõõtevahend mitmefaasilises süsteemis ja seadistatud ühendamiseks süsteemis rohkem kui ühe faasiga
polyphase instrument . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/polyphase%20instrument/1/eng (06.08.2026)