Thank you very much for viewing. I have only read it once, but since it's been stored by an amateur, I would appreciate it if you could understand that. Also, there are no smokers or pets in my family. As for the photos, the 5th and 6th photos may be difficult to see, but there are folds and scratches. If you can accept this, please consider purchasing. This book introduces the latest technologies and advancements in the construction industry. In particular, it explains in detail the crime of post-bid price increases and the evolution of roads. - Contents: The crime of post-bid price increases, roads in evolution, introduction of various technologies, etc. Retail price: 2400 yen