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hardness ageing
archit. 加工硬化时效
chem. 硬度时效
met. 冷作时效; 机械时效; 加工〔硬化〕时效
plast. 硬化时效
tech. 加工时效; 硬度老化
hardness ageing
: 3 phrases in 2 subjects
Electronics2
Metallurgy1