permanent hardness
英 [ˈpɜːmənənt ˈhɑːdnɪs]
美 [ˈpɜːrmənənt ˈhɑrdnəs]
网络 永久硬度; 又称永久性硬度; 永久性硬度
双语例句
- By employing a new type of high temperature resistant scale inhibitor, also adding soda ash to reduce permanent hardness in the water system, as well as utilizing rationally the condensate, scaling in the water system lessens efficiently.
通过使用新型耐高温阻垢剂，同时添加纯碱降低水系统中永久硬度的方法及冷凝液的合理利用，使水系统结垢问题得到有效缓解。 - The results show: At the initial stage of aging, compression permanent distortion, tensile stress, crosslink density and hardness increased, while resilience rebound, tensile strength and elongation at break decreased;
在老化初期以交联为主，回弹率、扯断伸长率下降，压缩永久变形率、交联密度、定伸应力和硬度增大； - Three softening methods had been tested, and the result showed that the efficiency of calcined soda-caustic soda softening method was better than calcined soda softening method and calcined soda-lime softening method to treat the system effluent with higher permanent hardness.
对三种软化方法的考察结果表明，对于永硬较高的循环水系统排污水，纯碱烧碱法的软化效果优于纯碱法和纯碱石灰法。 - And it is difficult for the solubility of salt to remove permanent hardness.
众所周知，高矿化度地下水主要的去除指标为溶解性盐，而目前溶解性盐中较难去除的物质主要永久硬度。 - Therefore, how to remove permanent hardness will become a difficult problem of high salinity groundwater treatment.
因此，如何去除永久硬度就成为高矿化度地下水处理中的一大难题。