

소개
Discover the importance of the cog and its crucial role in history from ancient civilizations to the modern day; perfect for fans of The Highlights Book of How and The New Way Things Work, by David Macaulay.

Discover the importance of the cog and its crucial role in history from ancient civilizations to the modern day; perfect for fans of The Highlights Book of How and The New Way Things Work, by David Macaulay.