外表面必须喷砂。

Surfaces must be sandblasted.

youdao

所有表面必须无油脂、水分或其它杂质，然后才能喷砂。

All surfaces must be free of oil, grease, moisture another foreign matter prior to blasting.

youdao

所有表面必须无油脂、水分或其它杂质，然后才能喷砂。

All surfaces must be free of oil, grease, moisture another foreign matter prior to blasting.

youdao