Results: It decreased nursing errors and infaust events and the satisfaction rate of patients was enhanced.

减少了护理差错和不良事件的发生，提高了病人满意率。

The appearance of mesosphere solidification and shaft direction solidification was infaust to obtain compact roll structures, that accelerated the roll to produce crack.

中间层凝固和轴向凝固的出现，不利于获得致密的轧辊组织，促进轧辊产生裂纹。