Double fold
A double fold is a process of folding a paper sample first backwards and then forwards about the same line, i.e. one complete oscillation.
A double fold is a process of folding a paper sample first backwards and then forwards about the same line, i.e. one complete oscillation.
A double fold is a process of folding a paper sample first backwards and then forwards about the same line, i.e. one complete oscillation.
Source: Wikipedia "Double fold" · CC BY-SA 4.0
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