机械设备处于髙温髙压工作环境时，应选择（ ）润滑。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24898' and id < 2124652 and id<>'2124652' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24898' and id > 2124652 and id<>'2124652' order by id asc limit 5