concrete strength短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 混凝土强度 The accuracy of the curve is tested and verified by the practical engineering, and the curve can be used as the curve for early- age ground slag concrete strength by rebound method in Zhengzhou. 经工程实践验证了该曲线的测试精度，建议可作为郑州市早龄期磨细矿渣混凝土回弹法的专用测强曲线。 cnki