带传动过程，不打滑的条件是需传递的圆周力F应小于或等于极限有效拉力。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24894' and id < 2124521 and id<>'2124521' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24894' and id > 2124521 and id<>'2124521' order by id asc limit 5