April 22, 2009
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March 14, 2009
Bücherrad
回転型書見台
Bookwheel
This device was invented by Italian military engineer Agostino Ramelli in 1588.

Bücherrad

回転型書見台

Bookwheel

This device was invented by Italian military engineer Agostino Ramelli in 1588.

March 13, 2009