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A comment on Why It Took So Long to Invent the Wheel (2012). Parent comment

Re:Why It Took So Long to Invent the Wheel (2012) by Retric on Saturday October 29, 2016 @12:17PM (#12824624)
Tiangong Kaiwu only dates back to 1637, so do you mean it holds references to earlier steam engines? https://en.wikipedia.org/wiki/Tiangong_Kaiwu
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Re:Why It Took So Long to Invent the Wheel (2012) by jacquesm on Saturday October 29, 2016 @12:24PM (#12824662)
Yes, that's what I understood, that it documented ancient machinery.
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