Prepare and clean surfaces using methods such as scraping, sanding, sandblasting, hydro-blasting and steam-cleaning;
使用下列方法如刮，打磨，喷砂，水力喷砂和蒸汽清洗，准备和清洁表面；
Prepare and clean surfaces using methods such as scraping, sanding, sandblasting, hydro-blasting and steam-cleaning;
使用下列方法如刮，打磨，喷砂，水力喷砂和蒸汽清洗，准备和清洁表面；
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