“Based on the working principle of the seismograph invented by Zhang Heng, an upgraded version of the seismograph was developed. It does not require electricity or oil, but it is a bit labor-intensive”
JR1947.mp4
Size 1920×1080
Length 36:22
Video codec H264, 7000 Kbps
Audio codec AAC, 264 Kbps
Container MP4
Filesize 1.8 GB
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