... 秩高线 principal contour 半高线 halfline 至高线 XLO ...
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... principal component 知组份 principal contour 助线 principal direction 纸向 ...
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Contour principal 主等高线
principal stress contour 主应力等值线
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In such case, it is proved that, for the unique existence of solution, there must be given in addition the principal vector and the principal moment of the external forces on each boundary contour.
在这种情况下，为了解的唯一性，证明了必须另外给出每一边界围线上外力的主矢量与主力矩。
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