The hardness of water depends upon the amount of salts of lime and magnesia which it contains.
水的硬度是由其含石灰盐和氧化镁的数量决定的。
To solve the north high hardness of water quality, and hardness of the water quality in the south.
能够解决北方高硬度水质，以及南方中硬度水质。
Uncertain degree is evaluated to adopt EDTA titrimetric law to measure total hardness of water quality.
采用EDTA滴定法测定水质总硬度的测量不确定度评定。
At the same time, it can be determined according to the hardness of water and flushing times for the humidification tank.
同时，它可以根据水的硬度，确定加湿罐的冲洗次数。
Objective the different source of the water hardness were measured by the coordination titration.
目的用配位滴定法测定不同来源水的硬度。
Application of ion exchange softening method, can make steam boiler feed water hardness meet eligibility criteria.
应用离子交换软化法，可使蒸汽锅炉给水的硬度达到合格标准。
Conclusion the formation of ureteral calculus probably relating to the water hardness in some areas.
结论在一些地区输尿管钙石的形成可能与水的硬度有关。
The results of the research on the relation between the hardness and the temperature of dilution water and the performance of nano-retention aid show that the effects are obvious.
本文对稀释水的硬度、温度对纳米助留剂的影响进行研究，其研究结果表明稀释水质量对纳米助留剂性能的影响是相当大的。
ObjectiveThe different source of the water hardness were measured by the coordination titration.
目的用配位滴定法测定不同来源水的硬度。
Excellent performance of hardness, water and alcohol resistance; completely changing the idea about the worse performance of water-based coating.
具有非常高的硬度和优异的耐水性、耐醇性，完全改变了人们普遍认为水性漆性能差的观念。
A measurement method of water hardness based on chemometrics is presented.
提出一种基于化学计量学方法的水硬度的测量方法。
Under the optimal conditions, the processing of water can not only prolong the efficient exchange period of the resin, but also make the hardness of feeding water almost to zero.
在试验选择的优惠条件下进行水处理不仅能延长树脂的有效交换周期而且交换后的给水硬度可趋于零。
Treatment effects of using the coagulative precipitation and RO to treat high hardness and high sulfate-resistant(HSR) mine water were described in this paper.
叙述了采用混凝沉淀法、RO反渗透膜技术对高硬度、高硫酸盐型矿井水的处理效果。
The paper argues the stable treatment of high hardness and highly mineralized water.
通过研究高硬度、高矿化度水的水质稳定处理。
The results have shown that the hardness, water content and unit weight of soils are heavily affected by traveler activities for sightseeing beyond the limited roads.
结果表明：游客越出游道观光对游道外缘土壤的硬度、水分含量及容重产生了较大的影响。
The technique of treatment of water of high hardness and high alkality and the properties of water treatment agent ZH331HS and its application are introduced.
简要介绍了高硬度、高碱度的水处理技术和水处理剂ZH331HS的性能以及在循环水中的应用。
New environment-friendly water-based varnish: excluding ketones, volatile organic compounds were very low; durability and good abrasion resistance, surface hardness of up to 2H.
新型环保水性清漆：不含酮，有机挥发物含量极低；耐久性和抗磨损性好，表面硬度可达2H。
Apply to: improve the hardness of washing water.
适用于：改善洗涤用水的硬度。
A neutral high sudsing liquid cleaner for water of an hardness, Hand Dishwashing Detergent.
涤剂手洗清洁剂：用手手洗各种质量的器皿，并适用在任何硬度水质。
The effect of the water alkalinity and the water hardness on noodle quality was reviewed.
研究了水的碱度、硬度对面条品质的影响。
Cover crops can improve the water holding ability of soil; however, its effect on soil hardness depends on the moisture content of soil.
覆盖作物可改善土壤持水能力，但是对土壤硬度的影响与土壤含水率有关。
The performance of synergistic scale inhibition was investigated in different water temperature, magnetic field intensity, water hardness and concentration.
研究了不同温度、磁场强度、水质硬度及加药量下的协同阻垢性能。
It has been found from some investigations that TDS and hardness of drinking water correlate with the lethal rate of heart disease of the local population.
而且饮用水的硬度和总溶解性固体（TDS）和当地居民心脏病的死亡率有确定的正相关性。
The surface hardness of the materials having different compositions before and after absorbing water was studied, and the best formula was determined.
通过改变组分配比，研究水泡前后材料表面硬度的变化，筛选出最佳配方。
The water from the Songhua River system in Jilin Province features low hardness and low alkalinity and turns to water of scaling type when its enrichment factor is above4.
吉林松花江水系水质为低硬低碱水质特点，浓缩倍数大于4时转为结垢型水质。
An increase of the content of hard segmer will increase film hardness and elongation strength, and lower water resistance.
硬段含量提高，胶膜硬度增加，拉伸强度增加，胶膜耐水性降低。
Hardness of the water used in boiler is an important index to ensure security running in boiler.
锅炉用水硬度是保障锅炉安全运行的一项重要指标。
Hardness of the water used in boiler is an important index to ensure security running in boiler.
锅炉用水硬度是保障锅炉安全运行的一项重要指标。
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