对开式径向滑动轴承的厚壁轴瓦刮研时，应保持接触角一般为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24902' and id < 2124860 and id<>'2124860' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24902' and id > 2124860 and id<>'2124860' order by id asc limit 5