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mechanical calculator
/mɪkˈænɪkəl kˈælkjʊlˌeɪɾɚ/

/mɪkˈanɪkəl kˈalkjʊlˌeɪtə/
Mechanical calculator
01
calculadora mecánica, máquina contadora
a device that performs arithmetic operations through mechanical means, often using gears, levers, and other physical mechanisms, predating electronic calculators
Example
The accountant used a mechanical calculator from the early 20th century to tally up expenses for the ledger.
In the museum exhibit, visitors could try their hand at using a mechanical calculator to add and subtract numbers.

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