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to phrases
operational life
auto. 运行工作寿命; 使用期寿命
bridg.constr. 使用年限
el. 使用期限
plast. 运转寿命
space 工作［使用］寿命
tech. 服役寿命
operational life: 4 phrases in 3 subjects
Automobiles1
Nautical1
Technology2

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