金属经冷塑性变形，引起强度和硬度上升。采用（ ）来消除。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24889' and id < 2124338 and id<>'2124338' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24889' and id > 2124338 and id<>'2124338' order by id asc limit 5