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Universal scientific calendar for all the years of all the centuries. (Machine-translation by Google Translate, not legally binding)
Universal scientific calendar for all the years of all the centuries. (Machine-translation by Google Translate, not legally binding)
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机译：各个世纪以来所有年份的通用科学日历。 （通过Google翻译进行机器翻译，没有法律约束力）
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摘要
A model of universal scientific calendar, for all the years of all the centuries characterized by being formed by three equal parts joined to each other by means of a system of hook or any subject, so that they can be folded or folded one on another; carrying inside the upper and central parts, placed, six groups of carterillas or porta-hojas, which will be placed in a staggered form the 34 sheets or cards of which this model of calendar is composed and with only which will be placed form all the complete dates that are desired, taking the upper part a hole in the center either in the form of a box, circle, oval or any other figure that is desired, and in which it will appear, when it is folded over the central part, serving it of frame to the same the date formed in the porta-hoja, or central group, of the part of the center, forming in the lower part, the monthly, constituted by seven changeable strips between which will go the 31 days of the month, drawn by one face in one color and the other in another, being coupled in a series of grooves that have been made with the top printed seven days a week in the order from Monday to Sunday, and a little above This indication will take another slot, in which three cards will be attached with the months of January to December in a varied color, being exposed, the name of the month that has been formed. (Machine-translation by Google Translate, not legally binding)
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