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Breeding Of Plants And Reproduction By Means Of Culturing
(AREA)
Abstract
Una regla circular de cálculo, compuesta por dos discos de distinto diámetro acoplados por su centro en forma de que pueden girar libremente, caracterizada por presentar sus dos escalas graduadas principales de los dos discos indicados, divididas en tres distintos colores que valoran dichas graduaciones a los efectos de lectura de los resultados que se efectúan con aquellas escalas, y por estar provista de un cursor que lleva grabado un ángulo de un valor para hallar en una simple lectura el área de una superficie circular, conocido el diámetro.
ES0050307U1955-09-231955-09-23Regla circular de cálculo
ExpiredES50307Y
(es)