调速阀是由减压阀和节流阀并联而成。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24896' and id < 2124589 and id<>'2124589' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24896' and id > 2124589 and id<>'2124589' order by id asc limit 5