【Product Description】 ・This is a problem collection for "Denken San-shu" (Third Class Electrician) exam takers, published by Denki Shoin. ・It includes all problems and explanations from the past 10 years (2011-2020). ・It is a separate volume edition that can be detached by subject. 【Product Condition】 ・Condition: 　No writing. 　Purchased new and used. 　There are no noticeable stains, and I think it's in good condition. 　No smokers or pets. Please ask if you have any other questions. Thank you.