建设工程产品由设计转化为实体的首要步骤是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25977' and id < 2180373 and id<>'2180373' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25977' and id > 2180373 and id<>'2180373' order by id asc limit 5