【文化中国行】琢石续千秋 凝灰岩文保破解世界难题

https://content-static.cctvnews.cctv.com/snow-book/video.html?item_id=5973640422140612262&t=1786880001214&toc_style_id=video_default&track_id=D32514D9-80CB-4AB6-9C7F-8FD5A4059589_808576267765&share_to=wechat