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average velocity
tech.	平均流速
wind.	平均速度

average velocity: 55 phrases in 19 subjects

Air defense	1
Automobiles	1
Aviation	3
Bridge construction	1
Business	2
Compressors	1
Desert science	4
Earth sciences	1
Economy	1
Electronics	1
Explosives and Explosive Ordnance Disposal	2
Hydroelectric power stations	2
Hydrology	1
Oil / petroleum	4
Rail transport	1
Space	2
Sports	3
Technology	22
Wind Energy	2