Recommended for those taking the hazardous materials exam. I am selling these books now that I have obtained the qualification. This is an essential book that explains in detail the safety regulations and technology related to boilers. ① Title: Easy-to-Understand Boiler and Pressure Vessel Safety Regulations - Edition: New Edition - Price: 1430 yen - ISBN: 978-4-907619-29-9 - Contents: Details on safety regulations, boilers, pressure vessels, etc. ② Title: Boiler Operation Skills Training Textbook ③ Title: Boiler Illustrated Encyclopedia Some parts have been marked. Thank you for looking.