This paper proceeds some discussion about the optimized sand-ratio, ave rage paste thickness and aggregate packingdegree in the packing concrete mix proportion design.
本文对密实混凝土配合比设计中的最优砂率、平均胶结浆体厚度、骨料密实度进行了一些探讨。
2
Green packing requires reducing the cost of commodity packing and the pollution degree of environment caused by discard.
绿色包装既要降低商品包装的成本，又要降低包装废弃物对环境的污染程度。
3
Conical degree spiral packing has the advantage in the handling ability, pressure drop and dynamic holdup liquid and so on.