NAGRA Ⅳ D & L service manual 〈Clean dirt and scratches on the surface of books!〉

If you want to store your service manual carefully, please clean the surface of the book. This is because if machine oil gets on the paper, it will easily discolor books that are close together.
〈翻訳〉
service manualを大事に保管する場合、本の表面を綺麗にして下さい。機械油などが付着しますと隣の密する本に変色しやすくなるためです。