クレーン・デリック運転士免許試験問題集（限定なし）

Includes past questions from the first half of Reiwa 4th year (issues published in October 2019) to the first half of 2019 (issues published in October 2019)

Crane derrick operator's license test question collection (no limitation), the definitive version of the crane test countermeasure app!

With detailed explanations for all problems.

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