permanent hardness of water 水的永久硬度 dry hardness 干态硬度 cutting hardness 切削强度 grinding hardness 研磨硬度 hardness change 硬度变化量 hardness number 硬度值 相似单词 hardness n.[U] 坚硬,困难,严厉,勇气 water n. 1. 水,雨水,海水,水位,水面,流体,水域 v.[T] 1. 浇水,供以水...
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。 www.showxiu.com 2. Foam effects depending on the hardness of water. 泡沫作用根据所使用的水的硬度不同而不同。 www.bjzhika.com 3. Testing the Total...
hardness of water 英文hardness of water 中文【化】 水的硬度 【医】 水的硬度
Such salts interfere with the action of soap. In the early days of the twentieth century, most rural water came from wells, and most of it was hard. Indeed, in some places, it was reputed to be so hard that a rock dropped into the well would bounce when it hit the water. Slight ...
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The method is particularly suitable for controlling the acidity and water hardness of fibrous stock suspensions in plants which a) run with a totally closed circulation and/or b) process waste papers, whose wet strength has been improved with urea/formaldehyde condensation products and/or melamine/...
Step-by-Step Solution:1. Definition of Hard Water: Hard water is defined as water that does not form lather or foam with soap. In contrast, soft water easily forms lather with soap.2. Types of Ha
百度试题 题目水的硬度(hardness of water) 相关知识点: 试题来源: 解析 指溶于水中钙,镁盐类的总含量,以CaCO3(mg/L)表示,水的硬度一般分为碳酸盐硬度和非碳酸盐硬度,也可分为暂时硬度和永久硬度 反馈 收藏
1)hardness of water水的硬度 1.The Synthesis of a New Chromogentic Reagent Dibromo-o-Carboxychlorophosphonazo and its Application for the Determination of Hardness of Water and Calcium of Magnesium in Water;新显色剂二溴邻羧基偶氮氯膦的合成及其应用于测定水的硬度和钙镁含量 2.Effect of hardness of...
1. 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。2) boiler water hardness 锅炉水硬度3) boiler water 锅炉水锅炉用水4) Boiler water 锅炉用水 1. Research on determination of trace iron in ...