| 摘要 |
PROBLEM TO BE SOLVED: To provide a couple of bound printed sheets which are easy to observe individually, one by one, easily contrasted with each other without having any insistent impression nor entering a mental state of avoiding observation when observed one over the other, and easy to overlay by absorbing relative position shifts of printed figures of each page in printing and binding. SOLUTION: The couple of printed sheets show technical relation between two figures, one being printed on opaque paper (91) and the other being printed translucent paper (92); and the two technical figures each have their technical contents completed. Through holes (1a, 1b) are bored where the couple of printed sheets are overlaid one over the other and penetration shafts (2a, 2b) of a fixing tool are run through the through holes to bind the couple of printed sheets; and the relative overlaying position between the couple of sheets can be shifted while the couple of sheets are bound.
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