滚动轴承的材料，一般用轴承合金。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24900' and id < 2124794 and id<>'2124794' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24900' and id > 2124794 and id<>'2124794' order by id asc limit 5