润滑剂除了润滑作用外，还可以起到（ ）作用。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24898' and id < 2124648 and id<>'2124648' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24898' and id > 2124648 and id<>'2124648' order by id asc limit 5