De qué está hecho regla de cálculo
An analogue instrument for multiplying with logarithms.
- Slide rule stock — tiene como parte. The fixed part with the scales.
- Sliding middle scale — tiene como parte. A movable scale.
- Slide rule cursor — tiene como parte. A transparent sight with a hairline.
- Logaritmo — utiliza. The scales are logarithmic: multiplication becomes adding lengths.
- Madera — está hecho de. Slide rules were wooden, later plastic.