preform

英[priː'fɔːm] 美[priː'fɔːm]

vt. 预先形成；预制
n. 预成型件；雏形

过去式: preformed 过去分词: preformed 现在分词: preforming 第三人称单数: preforms

prefab adj.预制的；组合式的n.预制品=prefabricated.
preface n.序文；绪言；前言v.作序，写前言；以…开始
prefactor n.前因子
prefade vt.给(新织物或衣服)作预退色
prefatory adj.前言的；序文的

Verb:

form into a shape resembling the final, desired one
form or shape beforehand or determine the shape of beforehand

1. Otherwise, he will never be able to preform again.: 否则，他不会是能的再预先形成。

2. Preform design is important for forging process design.: 预制坯设计是锻造工艺设计中的重要内容之一。

3. At last, the development trends of preform design methods are put forward.: 最后指出了预成形设计的发展趋势。

4. Two methods used to liquid impregnate carbon fiber preform are introduced.: 介绍了液相浸渍炭纤维坯体的两种方法。

5. Two Methods: Used to liquid impregnate carbon fiber preform are introduced.: 介绍了液相浸渍炭纤维坯体的两种方法。

6. The key step in flashless forging is to optimize the design of preform die shape.: 锻造过程实现净形和近净形制造最关键的一点是对预锻模进行优化设计。

7. This preform is then heated to a temperature just below the melting point of the alloy.: 此时，将初步加工的成品加热到一定的温度，这个温度要刚刚低于合金的熔点。

8. The fabric is used as a preform for thermoplastic textile-reinforced composite modules.: 这种织物被用作热塑性纺织增强复合材料模件的预型件。

9. The fabric is used as preform for thermoplastic textile - reinforced composite modules.: 这种织物被用作热塑性纺织增强复合材料模件的预型件。

10. Preform, its manufacturing method, and container produced by biaxially stretching the preform.: 料坯，其生产方法，和从该料坯制造的双轴拉伸容器。

11. The fabricating process of preform and factors having effect on it were also studied systematically.: 系统地研究了预制块的制备工艺过程及影响因素。

12. Preform design in bulk metal forming is the central task of bulk metal forming process and die design.: 金属体积成形预成形设计，是材料多工序成形工艺与模具设计的中心工作。

13. Densification process of carbon fibrous preform is divided into two procedures, CVI stage and SCVD stage.: 炭纤维预形体的的增密工艺可分为CVI阶段和SCVD阶段。

14. The practice proves the reverse simulation technique is a very efficient approach to optimize the preform design.: 实践证明，反向模拟技术对于预成形优化设计是一种非常有效的方法。

15. The software can preform primitive data collection, spectral analysis, content and reserve calculation and plotting.: 开发的软件具有原始数据采集、能谱分析、含量与储量计算等功能。

16. The superior preform of composites is a basic requirement and one of key factors for obtaining superior properties composite.: 高质量复合材料预制块是获得高性能复合材料的基本要求和关键要素之一。

17. The proposed preform FE simulation optimization scheme is effective and overcomes the drawbacks of previous empirical design.: 所提出的有限元模拟预成形优化方法十分有效，克服了以往凭经验设计的弊端。

18. They are drawn from a much larger "preform" block of material, in much the same way that conventional optical fibres are created.: 它们从大块的材料上分离出来，其方法和传统的光学纤维提取差不多。

19. The superior preform of composites is a basic requirement and one of key factors for fabricating superior properties composites.: 摘要高质量复合材料预制块是获得高性能复合材料的基本要求和关键要素之一。

20. A useful study has been made on textile structure preform and RTM processing based on the manufacture of textile composites cabin.: 本文通过纺织复合材料舱体的研制对纺织结构复合材料及rtm工艺作了有益的探索。

21. Forging quality and technical economic benefit of plastic working industries strongly depend on preform sequence and preform design.: 锻件质量和锻造行业的技术经济效益很大程度上取决于预成形工步和预成形设计。

22. Numerical simulation results show that the optimal preform H/D dimension thus obtained can greatly reduce hammering times and die wear.: 数值模拟结果表明获得的预成形H/D最佳尺寸可明显减少模锻锤击次数和模具磨损。

23. Preform design is one of the key steps in precise plastic forming, and backward simulation technology plays important role in preform design.: 预成形毛坯设计是精密塑性成形工艺的核心环节，而反向模拟技术可以实现预成形设计的高效化、数字化和智能化。

24. Abstract: Forging quality and technical economic benefit of plastic working industries strongly depend on preform sequence and preform design.: 文摘：锻件质量和锻造行业的技术经济效益很大程度上取决于预成形工步和预成形设计。

25. The preform design applying the method for preform optimization based on FEM can improve the deformation uniformity within forgings effectively.: 应用基于正向有限元数值模拟和最优化方法进行坯料预成形设计的新方法，可显著提高锻件各部位的变形均匀性。

26. This paper introduced mode of collecting, technology of filtering and measuring process about image of three dimension composite preform surface.: 首先介绍了三维编织复合材料预制件表面图象的采集方式、滤波技术以及平均编织角的测试过程；

27. The recent trend of net shape and near net shape manufacturing requires that forging preform design should be optimized to save materials and energy.: 净形和近净形制造要求锻造预成形设计不仅要实现产品的形状，而且要实现材料、能耗、锻件质量等目标优化。

28. While women were able to preform well in all four activities at once, men performed, on average, worse when it came to planning to search for the key.: 结果是，女性几乎在这四个任务里都表现得很好，但是男性却差强人意，尤其是在处理寻找钥匙这个任务的时候。

29. While women were able to preform well in all four activities at once, men performed, on average, worse when it came to planning to search for the key.: 结果是，女性几乎在这四个任务里都表现得很好，但是男性却差强人意，尤其是在处理寻找钥匙这个任务的时候。

用作及物动词 (vt.)

The superior preform of composites is a basic requirement and one of key factors for fabricating superior properties composites.
摘要高质量复合材料预制块是获得高性能复合材料的基本要求和关键要素之一。
An algorithm of three-dimensional braided composite material preform image proce ssing based on mathematics morphology is presented.
提出一种基于小尺度的数学形态学的三维编织复合材料预制件图像的边缘检测方法。

laminated preform 叠层预成型物...

preem PRE preconditoning preformed foam prednisolamate pre-reaction pre-movement precast lintel pre-ordering prehnitic acid precompression pre-packaged

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