Writing board for holding sheet, has sheet holder and dimensions of writing board are identical with dimensions of sheet format and writing board is enclosed together with lying writing paper by sheet protector
摘要
<p>The writing board has a sheet holder. The dimensions of the writing board are identical with the dimensions of a sheet format. The writing board is enclosed together with the lying writing paper by a sheet protector. The height of the transparent sheet is substantially smaller than the height of the paper sheet and about one-third of the paper height. The peripheral length of the transparent sheet is elected in such a manner that it slides upward and downward as well as lies freely at the sheet and the rear side of the writing board.</p>
