Essential reading for the High-Pressure Gas Manufacturing Safety Supervisor exam. - Title: High-Pressure Gas Manufacturing Safety Supervisor Exam Marutane Chemical (Liquefied Petroleum Gas) Pass Problem Collection - Publisher: Ohmsha - Number of pages: 350 pages - Author: Yasuhiko Miyoshi - Contents: Contains 7 sets of exam questions - Key point: Understand the exam trends immediately - Key point: Detailed explanations of the answer choices - Key point: Complete exam preparation with this one book Thank you for viewing. This is for exam preparation for Class C Chemical Liquefied Petroleum Gas. I took the three subjects on November 9th using this book, and I probably passed. It was very helpful. There are no markings. I studied for two months, so there is some wear and tear. There are no noticeable scratches.