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Printableskanitawa
LockAbacus
This abacus allows the position of the beads to be fixed. It can be used by people with visual impairments. 3D models of frames that can hold 3, 5, 9, and 13 digits are available. Please print and assemble the required number of bead…
- Pobrania
- 9
- Polubienia
- 3
- Ocena
- 0