Scored for 156 machines, including 16 typewriters, 18 calculators, 8 adding machines, 12 hole punchers,
10 cash registers, 8 humidifiers, 8 telex machines, 2 metronomes, 4 bells, 2 doorbells, 10 claxons,
16 telephones, 40 experimental signal receptors, 1 forklift, 1 copy machine, and an elevator.
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