Title
Zhang Heng's seismograph
Caption
Zhang Heng's seismograph
Info+
photos12.com - Panorama Stock
Credit line
Photo12/Panorama Stock
Reference
OIP05041_ZQJH026
Model release
Yes
License type
Royalty free
Available size
15,0Mb (1,0Mb) / 6,8in x 8,5in / 2045 x 2563 (300dpi)