The cement appears to be a liquid protein . 胶接剂看去象是一种液态蛋白质。
2.
Road testing . measurement of the rate of hydraulic binders and additives in the cementitious materials . part 1 : chemical method for the determination of the cement content in a new mixed material 道路试验.粘结性材料中水压粘合剂和添加剂比率测量.第1部分:新混材料中胶接剂含量测定的化学方法