一次设备按照生产流程连接起来的构成的电路称为（  ）。 

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69483' and id < 4500427 and id<>'4500427' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69483' and id > 4500427 and id<>'4500427' order by id asc limit 5