impact-modified grade 冲击性改进级
The results show that the modified lignosulfonate has a better water-reducing performance as effectively as high grade concrete water reducing agent.
结果表明，改性木质素磺酸盐具有较好的减水性能，且达到高效减水剂的减水性能。
The dyeing and printing process for polyester and its acid modified blend fabrics is groped, the reasonable conditions are defined, quality and grade of the fabric are raised.
对涤纶酸改性混纺织物的染整工艺进行探索，制定了合理的生产工艺，提高了织物的质量、档次。
The SBR modified asphalt which has good low temperature property is widely used for high grade road paving.
SBR改性沥青具有优良的低温性能，广泛应用于高等级道路的铺筑中。
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