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系统设备
el. system unit
railw. system equipment
tech. system device
系统 设备
: 362 phrases in 30 subjects
Air defense5
Animal husbandry1
Automobiles1
Aviation110
Business1
Cryptography1
Drilling1
Earth sciences8
Ecology1
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Electronics121
Engineering geology1
General3
Geophysics1
Information technology9
Mechanics5
Metallurgy4
Military2
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Rail transport5
Space27
Technology33
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