The 3-d evolving model of LCCC solder joint shape is based on the minimal energy principle and the solder joint shapetheory.
基于最小能量原理和焊点形态理论，建立了LCCC器件焊点三维形态预测模型。
2
In shapetheory, the three-dimensional deformation theory of plate and strip rolling is an important and difficult study content.
板带轧制的三维变形理论是板形理论研究的重点和难点。
3
Shape quality has been improved by using shape control equipment on the condition of shapetheory make no great breakthrough. But the external cause can't solve the essential question.