Library shelf moving trolley. I'm not really sure how it's functioning without destroying the shelves, but the image is from a website of professional movers who specialize in library moving.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...y_fullsize.jpg
More: http://www.hallettmovers.com/library-moving
Previously:
Moving a one-million-pound wall - GIF
Moving a 120-year-old lighthouse - photo
Moving furniture into apartments - GIFs and photo
Many Amish men lifting and moving a large barn by hand - GIF
Translift for moving homes - video and photo
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