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quality improvement
auto.	质量品质改进
el.	质量提高
exhib.	品质改善
logist.	质量改进改善
qual.cont.	质量改善
space	质量改进

quality improvement: 45 phrases in 16 subjects

Agriculture	1
Automobiles	1
Aviation	13
Business	2
Commerce	3
Ecology	2
Economy	4
Engineering geology	1
Environment	1
Hydroelectric power stations	1
Metallurgy	3
Oil / petroleum	1
Oil processing plants	2
Securities	1
Space	2
Technology	7