G PHYSICS
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G07 CHECKING-DEVICES
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G07C TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
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G07C3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
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G07C3/14 Quality control systems
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