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Calculation device to determine the agenesis and conceptional periods in the menstrual cycle of women (Machine-translation by Google Translate, not legally binding)
Calculation device to determine the agenesis and conceptional periods in the menstrual cycle of women (Machine-translation by Google Translate, not legally binding)
A calculation device to determine the agenesis and conceptional periods in the menstrual cycle of women, characterized by comprising two laminar pieces in the form of concentrically rotating and superimposed discs. (Machine-translation by Google Translate, not legally binding)
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