Suanpan
Suanpan: chiński abakus (abak), chińska forma liczydła.
soroban
Abak
Abakus: także abak, liczydło – zwłaszcza w starożytności. Określane także jako “tabliczka Pitagorasa”. Podobny charakter ma chiński suanpan czy japoński soroban.
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