quality of expansion agent
quality of expansion agent
膨胀剂质量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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It is concluded that fly ash and expansion agent are the main factors influencing the surface quality of concrete and the surface quality can be improved essentially by adjusting the mix ratio.
得出结论：粉煤灰和膨胀剂是影响混凝土表观质量的主要因素，通过调整配合比可以从根本上改善混凝土的表观质量。
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