total hardness 总硬度 ; 水的总硬度
total hardness of water 水的总硬度 ; 水总硬度
Total Hardness Test 总硬度测试条
Total Hardness Quant Test Strips 总硬度测试带
groundwater total hardness 地下水总硬度
total hardness of groundwater 地下水的总硬度
total l hardness 总硬度
Major Inorganic Components: Sodium, potassium, chloride, calcium, magnesium, alkalinity, total hardness, total phosphorus, fluoride, sulphate.
主要无机成分：钠，钾，氯，钙，镁，碱度，总硬度，总磷，氟化物，硫酸盐。
The total hardness, sulfate, chloride and consumption oxygen quantity in mixing water , underground water and surface water existed significant difference(P<0.01).
其中，混合水、地下水、地面水总硬度、硫酸盐、氯化物、耗氧量四项指标有显著差异（P<0.01）。
Making use of the cause and effect diagram to analyse the sources and influences of uncertainty in determination of total hardness in water by EDTA titrimetric method was introduced.
采用直观的因果图，对EDTA滴定法测定水中总硬度的不确定度的来源及其对测量不确定度的影响进行分析。
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