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G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
G06M1/00—Design features of general application
G06M1/28—Design features of general application for zeroising or setting to a particular value
G06M1/30—Design features of general application for zeroising or setting to a particular value using heart-shaped or similar cams; using levers
G06M1/303—Design features of general application for zeroising or setting to a particular value using heart-shaped or similar cams; using levers with drums
