【Product Contents】 〇 New Technology and Regulations for Pollution Control: Water Quality Edition 2024 (3-volume set) This is the official textbook. It's an essential book for passing the exam. 〇 National Examination for Pollution Control Manager, etc.: Correct Answers and Hints - Water Quality 2024 Includes past questions, correct answers, and explanations for 5 years from 2019 to 2023. The above two sets are included. 【Condition of the Product】 There are no writings or markings. There is some wear and tear, but there are no noticeable folds or tears, and there is no problem with studying. Thank you.