system certification

: 53 phrases in 19 subjects

Air defense	2
Automobiles	1
Aviation	11
Business	2
Chemistry	1
China	3
Economics	1
Electricity	1
Electronics	3
Law	1
Metallurgy	5
Name of organization	4
Nautical	1
Oil processing plants	1
Quality control and standards	1
Space	3
Technology	5
Textile industry	6
Wind Energy	1