危険物乙5類問題集

The definitive version of the Hazardous Materials Handler Class B Class 5, Otsu 5 countermeasure app! 240 questions carefully selected to the production format.

With detailed explanations for all problems.

This application "Hazardous material Otsu 5 problem collection" is free. You can use all functions and all problems for free.

Install this free app now if you want to take Dangerous Goods Handler Otsu 5!