1·At the same time, some mechnical phenomena at necking stage are concisely described.
同时，对颈缩阶段中有关力学现象进行了简要的描述。
2·So this paper will discuss the effect of defects on necking and stability of tensile deformation, which will help up to understand and master superplastic tensile deformation correctly.
研究讨论缺陷对于拉伸变形的颈缩、稳定性的作用，这有利于正确理解和掌握超塑性拉伸变形过程。
1·The deformation characteristic of the flame pipe necking was analyzed.
分析了火焰管缩口的变形特点。
2·It has been introduced the principle and structure of necking machine for the front cross member pipe.
介绍了前横梁管材缩口机的原理及结构。
1·To compensate for annealed wire diameter necking problem.
为了补偿退火线径变细的问题。