The results show that: with the initial principal stress direction angle increases, the axial residual deformation from the compression state gradually transits to the elongation.

结果表明：随着初始主应力方向角的增大，轴向残余变形由压缩状态的正值逐渐过渡到伸长状态的负值。

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In establishing residual limits, it may not be adequate to focus only on the principal reactant since other chemical variations may be more difficult to remove.

在确定残留物限度时，也许只是集中注意主要的反应物做得并不够，因为也许有别的化学变异产物更难以除去。

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The main research methods:(1) Screening the principal arguments influencing stock estimation by utilizing ridge trace analysis and the principle of residual mean squares.

用岭迹分析及平均残差平方和准则筛选影响蓄积估测的主要因子；

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