Removable loose -leaf book that unloads binding
The utility model provides a removable loose -leaf book that unloads binding, includes the book front cover, the book front cover along the middle part turn over form before front cover and back frontcover, have a plurality of pages in the front between front cover and the back front cover, be equip...
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Format: | Patent |
Sprache: | chi ; eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
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