目前所用的电力电子器件均由（）制成。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32647' and id < 2595918 and id<>'2595918' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32647' and id > 2595918 and id<>'2595918' order by id asc limit 5