Comprehensive Shikaku 1st-class Piping Construction Management Engineering Examination Training Textbooks, set of 2. I received these during new employee training, but I am selling them because I passed the exam using a different textbook. I didn't use them, but they were stored upright, so the bottom right corners are slightly creased. - Title: 1st Class Piping Construction Management Engineering Examination - Type: Training Textbooks - Number of books: Set of 2 - Condition: Slightly used Thank you for looking.