Use APKPure App
Get 危険物取扱者 乙4 問題集一問一答 解説付き old version APK for Android
Hazardous materials handler Class B 4 test preparation app. It is convenient for memorizing when commuting to work or school because explanations are given each time you solve it in a question-and-answer format. You can use it according to your purpose because it is a point learning and practical problem.