装配推力球轴承时，紧环应安装在（ ）的那个方向。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24901' and id < 2124831 and id<>'2124831' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24901' and id > 2124831 and id<>'2124831' order by id asc limit 5