缓凝剂适用于（ ）的混凝土。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id < 2396655 and id<>'2396655' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id > 2396655 and id<>'2396655' order by id asc limit 5