JA6/A-HR,JA6/A-SR,JA6/A-FR,JA6/B-HR,JA6/B-SR,JA6/C-HR,JA6/D-FR,JA6/E-HR,JA6,数显仪
4）仪表与3线制、4线制电压、电流变送器的接线

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