1) negetive hard water
负硬水
1.
Treatment of "negetive hard water" by using weak acidic resin;
弱酸树脂处理“负硬水”
2) negative hardness
负硬度
1.
The corrosion and scale conrtol for the high corrosion and negative hardness cooling water were studied.
德赛公司和某电厂针对该电厂的高腐蚀性、负硬度循环水在冬季供暖期的结垢和腐蚀问题进行联合攻关,以聚天门冬氨酸为主剂的配方被用于试验中,结果表明当药剂浓度达到8。
2.
A relationship between negative hardness and the susceptibility of restraining scale formation of magnetized water was studied by a dynamic test imitated cyclic cooling water.
应用模拟循环冷却水动态实验，对负硬度与磁化水抑垢效果的关系进行了深入探讨。
3) hard water
硬水
1.
Hard water inhibited significantly the growth of poinsettia.
硬水显著抑制一品红生长。
2.
Application properties showed that when pH=7,its dispersing power(lime soap dispersing power is 2%) was the best in different hard water compared with LAS a.
应用性能研究表明,不同硬水中,钙皂分散性在pH=7时均为最优(钙皂分散指数为2%),渗透性随pH的增加而减小,两者均好于LAS和OAB;产品在pH=8时对油酸的乳化性优于LAS和OAB;去污性和泡沫性几乎不受水硬度的影响,当m(NDASPS)∶m(LAS)=1∶2时,其去污值达到66。
3.
The effects of pH and major ions of hard water on growth, water relations, root physiology, and ion content of root and shoot were reviewed .
硬水对盆栽花卉生长的抑制效果十分突出,严重降低产品品质。
5) water hardness
水质硬度;水硬度
6) water hardness
硬水，水的硬度
补充资料：硬水(hardwater)
【硬水】(hardwater)含钙盐、镁盐较多的水。水中的钙盐和镁盐能与肥皂起化学作用生成难溶于水的钙（镁）盐沉淀，使肥皂失去去污能力。含钙、镁的酸式碳酸盐较多的水称为“暂时硬水”，煮沸时碳酸氢盐分解成碳酸盐而析出形成水垢，如井水。含钙、镁的硫酸盐较多的水称不“永久硬水”，煮沸时无沉淀物析出，如海水。水中溶解的这些少量钙、镁盐通常以每百万份水中含有多少份碳酸钙（“度”或“ppm”，为partspermillion的缩写）表示。硬水用作锅炉
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条