按照这些原则与方法确定分段切除顺序时可提高凸模的抗折断能力。
The subsection excision sequence determined according to these principles and methods can improve the punch's resistance to fracture.
第四章从收益法的基本模型着手，对收益额的选择与确定以及折现率的确定原则和方法进行探讨。
Chapter four sets about from basic model of income approach, to choice and confirm and definite principle and method of discount rate carrying on discussion, and income of volume.
本文结合温室结构和荷载的特点，具体论述了屋盖荷载的确定原则与计算方法。
Determining principle and calculating method of the load of greenhouse roof are particularly expounded in the light of the structure of greenhouse and the characteristics of the load.
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