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scale of hardness
agric. 硬度标
eng.geol. 硬度表〔计〕
plast. 硬度标度
tech. 硬度结垢; 硬度等级; 硬度表; 硬度标准
scale of hardness: 9 phrases in 4 subjects
Agriculture1
Electronics1
Metallurgy1
Technology6