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iron filings , iron scale
Nonmetal aggregate floor hardener is made of nonmetal aggregate, special cement and other addictives of a certain grain degree. It can be used as soon as the bag used to pack the hardener is opened.
非金属骨料地面硬化剂由一定颗粒级配比的非金属骨料、特种水泥、其它辅料和外加剂组成，开袋即可使用。
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