☆ Instant purchase OK ☆ ☆ Welcome to bulk purchases ☆ There is a colored pencil stain on the back cover, but there are no other noticeable tears, folds, or stains. There are no writings inside, and I think it's clean. This is a used item that has been stored at home for a long time. Thank you for your understanding. I also have various technical books (mainly related to electricity and energy) for sale. Please take a look if you'd like m(_ _)m #PolikoUsedBooks "Energy Management Engineer Exam Course "Thermal Field/Electrical Field Common" 1 (Energy Comprehensive Management and Regulations)" Energy Conservation Center Price: ¥2600 #EnergyConservationCenter #book #engineering/industry/general