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咬入是指轧辊对轧件的摩擦力把轧件拖入辊缝的现象（）

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For example, it is estimated that SAS turnover rate is 4 percent compared to the industry norm of more than 20 percent per year.

While the free health clinic costs $1 million to operate, it is $500 000 less than the costs the company would realize if employees were treated elsewhere.

SAS provides a free health clinic as well as an eldercare program that helps employees locate nursing care facilities for aging parents.

The company also offers an exercise physiologist to help employees suffering from stress.