|  | How to make a quadruple origami leaf(page 26) |  | 
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 | 49. Apply the 5th valley-fold of the step #48. 
 Prepare to open the origami leaf model. | 
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 | 50. Open the origami leaf model. 
 Prepare to apply a set of "nail-fold" . 
 Studythe above link to learn how to apply a nail-fold. |