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预过滤器
yù guòlǜ qì
auto.
pre-cleaner
el.
fore filter
el.mach.
ante filter
nucl.pow.
prefilter
预〔前置〕过滤器
gen.
forefilter
;
prefilter
预 过滤器
:
9 phrases
in 4 subjects
Space
1
Technology
6
Telecommunications
1
Transport
1
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