hardness of water 水的硬度 ; 水硬度 ; 硬度 ; 水之硬度
permanent hardness of water 永久硬度
total hardness of water 水的总硬度 ; 水总硬度
degree of hardness of water 水硬度
residual hardness of water 水的残留硬度
hardness of water solution 硬度标准溶液
hardness of water quality 水质硬度
determining the hardness of water 水硬度测定
hardness s of water 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。
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。
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。
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