另外，黑土所释放微博天然酸，因对硬度离子（hardness ion）也存在造成螯合响应qq才能，因此兼备软化水质曼联功效，所以黑土广受个别花费者欢送，不过价钱偏高，可长短团宝网凤姐使用得起天...
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hardness-ion 硬度离子
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。
The surface hardness variations of some kinds of polymers were compared and the influence factors such as ion species, particle energy and dose were analyzed.
通过比较几种不同类型的聚合物材料在注入前后表面硬度的变化，分析注入离子种类、注入能量、注入剂量等工艺参数对聚合物的影响。
This test has been shown that the hardness and the anti-corrosion properties of the Ta-surface will be greatly improved by use of the N-ion implantation.
实验研究证实，通过氮离子注入的方法对钽基材进行表面强化，可大大提高钽材的表层硬度及耐蚀性能。
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