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line detection
AI.	线检测
tech.	线条检测

line detection: 24 phrases in 15 subjects

Air defense	3
Automobiles	1
Aviation	1
Chemistry	1
Drilling	1
Electronics	1
Geophysics	1
Hydroelectric power stations	1
Information technology	1
Metallurgy	4
Oil / petroleum	2
Space	1
Technology	4
Textile industry	1
Water resources	1