Denken Type 1 and 2, Professional Engineer, OHM Electrical Comprehensive Magazine Ohm, February 2024 Issue, Electrical Comprehensive Magazine, Books, Magazines To protect against water damage, the item will be placed in a plastic bag before being put in an envelope for shipping. I believe it is in a clean condition with no noticeable stains, but I would appreciate it if you could understand that it is a used item. Thank you. Contents: [Special Feature] ・Basic Knowledge of Grounding for Extra-High Voltage Consumers 　By: Takahito Soda (Nihon Chiko Co., Ltd.) 　Cooperation: Nihon Chiko Co., Ltd. [Series] ・Dr. Fudo's Research Institute - Learning from the Past and Present of Denken and Practical Work - 　Distribution Line Operating Condition Monitoring System (Part 2) 　…Hiroyuki Fudo ・Learn Power System Protection Relays Easily 　Latest Trends in Protection Relay Devices 　…Tadaaki Yasuda ・Key Technologies That Electrical Engineers Should Know 　Electrical Railway Power Feeding Systems, Electrolytic Corrosion/Inductive Interference, Voltage Changes 　…Tomio Go [License Series] ・Professional Engineer's HOT Words Leading to General Supervision Qualification 　Intellectual Property Rights, Industrial Property Rights, Patent Rights, Utility Model Rights, Design Rights, Trademark Rights, Copyright, Prior Use System, International Application System 　…Takeshi Minamino ・Easy-to-Understand Denken Type 2 Secondary Examination Passing Seminar 　Unit Method 　…Hiroyuki Okabe ・Troubleshooting! Denken Q&A 　What kind of graph does a transient phenomenon have? (RL Series Circuit Edition) and others 　…Denken Academia <Denki Otoko, Suriashi no Kato, Nabe-san, niko>