The application of arc spray technology on repair of large - size shaft is introduced. And the developing trend of arc spray technology is prospected.
介绍了电弧喷涂工艺在大型轴件修复上的应用，展望了电弧喷涂工艺的发展趋势。
At last the developing trend of Electronic Commerce techniques is prospected.
最后，展望了电子商务应用未来的发展趋势。
The popular models are reviewed, and a possible developing trend in this field is prospected in this paper.
本文总结评述了现存的主要模型，提出交通流元胞自动机模型研究领域今后可能的发展趋势。
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