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Measurement of the level of dirtiness of a filter in a fluid, especially hydraulic fluid, circuit, whereby filtered and unfiltered fluid are connected to a differential pressure transducer that is linked to evaluation electronics?keyword=Measurement of the level of dirtiness of a filter in a fluid, especially hydraulic fluid, circuit, whereby filtered and unfiltered fluid are connected to a differential pressure transducer that is linked to evaluation electronics 专利,更快更准确