All surfaces must be free of oil, grease, moisture another foreign matter prior to blasting.
所有表面必须无油脂、水分或其它杂质，然后才能喷砂。
All the surfaces must be free of oil, grease, moisture, dust and other foreign matter before application.
涂装前所有的表面必须没有油脂、水汽和杂质。
All the surfaces must be free of oil, grease, moisture, dust and other foreign matter before application.
涂装前所有的表面必须没有油脂、水汽和杂质。
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