It is an application that allows you to learn the past problems announced in October 2021 of the X-ray work chief qualification test in a quiz game format.You can learn well because the answer explanation is attached.The content is the same as the book "X-ray work chief past problem / answer commentary" sold by us (one time).Please do your best.We are not responsible for any damage caused by browsing this app.
エックス線作業主任者 2021年10月
