Mathematical Treasure 18thC. Chinese Encyclopedia of Mathematics
Chinese Math Tool. Web dimension:approximately 9.65 x 3 x 0.75. 13 digit professional soroban style abacus with wooden frame.
13 digit professional soroban style abacus with wooden frame. Web dimension:approximately 9.65 x 3 x 0.75.
13 digit professional soroban style abacus with wooden frame. Web dimension:approximately 9.65 x 3 x 0.75. 13 digit professional soroban style abacus with wooden frame.
