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Integrator
Planimeter
Planimeter
Deformer apparatus
Brass plumb bob
Field protractor
Altimeter
Dietzgen odometer
Directional compass
Surveying aneroid
Slide rule
Military slide rule
Slide rule
Logarithmic slide rule
Winslow strength-computing slide rule
Cylindrical calculator
Rolling parallel ruler
Precision protractor
Keuffel and Esser Le Roy lettering set
Dotting instrument

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