giving a value which is a function of two or more values, e.g. product or ratio

Full Title

Measuring arrangements giving results other than momentary value of variable, of general application (G01D3/00 takes precedence; in tariff metering apparatus G01D4/00; transducers not specially adapted for a specific variable G01D5/00) > giving a value which is a function of two or more values, e.g. product or ratio