145#11 file line nine beads three-color abacus wooden children's abacus mental calculation kindergarten dedicated 9 beads 11 bits
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Abacus Name: 13-Gear Nine-Bead Wooden Abacus for Children
Abacus Specification: Length 26.5cm * Width 10.5cm * Height 2cm
Abacus single weight: 0.22kg
Abacus material: wooden frame, plastic beads, beads color can be customized.
Calculator packaging quantity: 100 pieces per box