minimum strength meaning in English

最小强度

Minimum strength class of masonry
砌体材料最低强度等级47
The main achievements in this paper are as following : 1 based on the systematical study about physical properties , particle morphologies and micro - mechanism of ultra - fine fly ash , cufa ii products are successly developed by means of optimizing the particle gradation and activation technique . hprrc composed of cufa ii products and with the strength grade no less than 32 . 5r ordinary portland cement can meet the minimum strength index demands . at present , cufa ii has been produced commercially and applied to engineering
本文主要研究成果如下： 1 、在系统研究了超细粉煤灰的物理性能、形貌、粉体效应微观机理的基础上，采用粉体优化组合、活化激发技术，复配的cufa产品与32 . 5r及以上的普通硅酸盐水泥配制的hprrc可达到12 48h开放交通所需的最低强度指标要求；该产品己工业化生产并推广应用。