ꯌꯨꯝ
ꯆꯥꯡꯅꯥꯏꯗꯕ
ꯆꯪꯁꯤꯟꯕ ꯃꯅꯨꯪꯗ
ꯁꯦꯝꯐꯝ
ꯚꯥꯔꯠꯄꯤꯗꯤꯌꯥ ꯃꯇꯥꯡꯗ
ꯌꯥꯅꯤꯡꯗꯕ ꯐꯣꯡꯗꯣꯛꯄꯁꯤꯡ
ꯚꯥꯔꯠꯄꯤꯗꯤꯌꯥ
ꯊꯤꯕꯥ
ꯁꯥꯔꯤ Science and technology of the Yuan dynasty
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