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单线自动闭塞

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: 213 phrases in 46 subjects

Agriculture	3
Air defense	1
Automated equipment	1
Automobiles	5
Aviation	1
Bridge construction	4
Business	5
Chemistry	2
Commerce	3
Communications	1
Compressors	2
Computer networks	1
Desert science	1
Drilling	1
Economics	2
Electric machinery	1
Electricity	2
Electronic commerce	1
Electronics	31
Engineering geology	1
Explosives and Explosive Ordnance Disposal	1
Fishery fishing industry	1
Genetics	1
Hydroelectric power stations	8
Information technology	11
International trade	4
Librarianship	1
Marketing	3
Mechanics	1
Metallurgy	5
Milk production	1
Nautical	2
Oil / petroleum	3
Physiology	1
Planning	1
Plastics	2
Project management	2
Public security	1
Scientific	1
Space	2
Surveying	1
Technology	60
Telecommunications	21
Textile industry	8
Transport	1
Wind Energy	1

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