DIN 43807:1983-10 Measuring and control; electrical measuring instruments; terminal markings for switchboard meters, panel meters and measuring transducers for the measurement of power and power factor
1983DIN 43807:1983-10 Measuring and control; electrical measuring instruments; terminal markings for switchboard meters, panel meters and measuring transducers for the measurement of power and power factor
1983DIN 43807:1983 Measuring and control; electrical measuring instruments; terminal markings for switchboard meters, panel meters and measuring transducers for the measurement of power and power factor