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变速恒频
avia.
variable speed constant frequency
变速/恒频
avia.
variable speed/constant frequency
变速恒频
系统
avia.
variable speed constant frequency
system
变速恒频
电源系统
el.
variable speed constant frequency
system
变速/恒频
:
7 phrases
in 4 subjects
Aviation
2
General
1
Space
1
Wind Energy
3
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