Either resultant or pull out force strategy 2 and 4 were less than other three strategies.
在合力和拔出力的比较中,第2、4策略的结果均低于其他三种策略。
The relationship between mean pull out force and content of powder is similar to "S" curve.
平均抽拔力与粉末含量的关系趋势基本呈“S型”曲线。
If I can figure out a way to force the child class (PartDb) to tell the parent class the value of this SQL string, I can pull this method up as well.
如果能够迫使子类(PartDb)把这个sql字符串的值告诉父类,就可以把这个方法提升到父类中。
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