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非定常
avia.
unsteady
非定常:
108 phrases
in 16 subjects
Aviation
42
Bridge construction
1
Chemistry
2
Compressors
1
Construction
1
Earth sciences
1
Economy
1
Engineering geology
2
General
5
Hydroelectric power stations
9
Metallurgy
3
Rail transport
2
Securities
1
Space
5
Technology
19
Wind Energy
13
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