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正循环
zhèngxúnhuán
oil
direct circulation
;
normal circulation
space
direct cycle
tech.
positive cycle
正 循环
:
36 phrases
in 14 subjects
Aviation
3
Bridge construction
3
Business
1
Commerce
1
Desert science
1
Drilling
1
Earth sciences
1
Electronics
1
Engineering geology
7
Explosives and Explosive Ordnance Disposal
2
Mathematics
2
Oil / petroleum
2
Space
3
Technology
8
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