Delwedd:Qinghuajian, Suan Biao.jpg

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English: Bamboo slips housed in Tsinghua University. This set of slips was a chart for calculation.
中文：​清华简之“算表”，战国时代的乘法计算工具
Dyddiad
Ffynhonnell http://news.xinhuanet.com/tech/2014-01/08/c_125970946.htm
Awdur People from Warring States Period (476-221 BC)

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This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1931.

Canfyddwyd bod y ffeil yn rhydd o gyfyngiadau yn ôl cyfraith hawlfraint, gan gynnwys pob hawl perthynol a chyfagos.
The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain".
This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.

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cyfredol12:51, 7 Medi 2020Bawdlun y fersiwn am 12:51, 7 Medi 20201,528 × 2,096 (2.63 MB)wikimediacommons>CmgleeUse more complete image from http://engine.scichina.com/publisher/CSPM/journal/CAHST/1/1/10.3724/SP.J.1461.2017.01001 without numbers at the bottom.

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