两摩擦表面间的膜厚比A<0. 4时，其摩擦状态为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24897' and id < 2124606 and id<>'2124606' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24897' and id > 2124606 and id<>'2124606' order by id asc limit 5