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Wooden Frame Abacus, 2 Steel Wires Entomology & Zoology_Zoology Models Ten-centimeter brass cone on an

Wooden Frame Abacus, 2 Steel Wires Entomology & Zoology_Zoology Models Ten-centimeter brass cone on anWooden framed abacus with two steel wires of 20 beads each on a 13. 5 by 5 inch base, a beginner level counting tool for preschool and early elementary number introduction.

SKU: 31998575740 · From composequickly.com

4.8
USD29.41 USD70.41

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Description

Ten-centimeter brass cone on an ebonite insulator and metal base

blue and the secondaries green

sized for a complete length-versus-strength comparison study using one consistent material

suited to fieldwork in geography units and orientation activities outside the classroom

Wooden Frame Abacus, 2 Steel Wires Entomology & Zoology_Zoology Models Ten-centimeter brass cone on anWooden framed abacus with two steel wires of 20 beads each on a 13. 5 by 5 inch base, a beginner level counting tool for preschool and early elementary number introduction.

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