What changes for the mix design procedure will be required?
配料设计方案会进行什么改变？
Therefore, the study of optimizing mix design must be enforced.
因此，级配优化研究工作势在必行。
The theory of concrete mix design should also be perfected.
免振捣混凝土的配比设计理论也需要进一步地加以完善。
The theory of concrete mix design should also be perfected.
免振捣混凝土的配比设计理论也需要进一步地加以完善。
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