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biquinary abacus
释义
biquinary abacus
biquinary abacus
[
bī′kwin·ə·rē ′ab·ə·kəs
]
(mathematics)
An abacus in which the frame is divided into two parts by a bar which separates each wire into two- and five-counter segments.
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更新时间:2025/3/18 11:56:15