it is a circuit used for measuring fuel level. high corrosion resistance good wearing resistance resistor card:Important parameters1,Fine line resolution:>= 0.12mm .2,Dried wearing resistance: Max2,000,000times wearing resistance with gasoline: Max 5,000,000times3,Stable and precise resistor value.4,High precision (tolerance of resistor value can be controled in 0.2 after passive trimming)5, ...