Generator of calculating tables for mercantile, banking, industrial, technical, mathematical and similar uses. (Machine-translation by Google Translate, not legally binding)

摘要

Generator of calculating tables for mercantile, banking, industrial, technical, mathematical and similar uses, characterized by being constituted by a series of surfaces of any shape that overlap, starting from a fixed one on which other movable, formed base of transparent material, being able to be said property of the transparency to be replaced also by the intercalation of scales. (Machine-translation by Google Translate, not legally binding)