... self excited generator 自励发电机 self filtration 固有过滤 self fractionating oil pump 自分馏油泵 ...
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self-filtration 自滤
ductless self-filtration vented enclosure 无风管自净型排风柜
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Now, that's a low bar, given -- (laughter.) But there was a team from Tennessee that had designed a self-powered water filtration plant so that homes in Appalachia could have access to clean water.
WHITEHOUSE: Education, Innovation & The Economy
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