preform
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vt.
预先形成；
n.
粗加工的成品；
变形
过去式：preformed过去分词：preformed现在分词：preforming第三人称单数：preforms
英英释义
preform[ pri:'fɔ:m ]
v.
form into a shape resembling the final, desired one
form or shape beforehand or determine the shape of beforehand
双语例句
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。
权威例句
The Osprey Preform ProcessCover with gapped adhesive preform
Computer-aided preform design in forging of an airfoil section blade ☆
Titanium powder production by preform reduction process (PRP)
Continuous-fiber preform reinforcement of dental resin composite restorations.
A new approach to preform design in metal forming with the finite element method ☆
Carbon composites based on multiaxial multiply stitched preforms. Part 1. Geometry of the preform
As-spray-deposited structure of an Al-20Si-5Fe Osprey preform and its development during subsequent processing
Application of artificial neural network and Taguchi method to preform design in metal forming considering workability
248 nm induced vacuum UV spectral changes in optical fibre preform cores: support for a colour centre model of photosensitivity
1. Otherwise, he will never be able to preform again.
否则，他不会是能的再预先形成。
danci.911cha.com
2. 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。
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3. The reasonable shape of preform and distribution law of field variables in forming process could be obtained by equipotential field method compared to the existent electrostatic field method.
与已有静电场法相比，类等势场法不仅能获得合理的预制坯形状，通过分析还可以获得其成形过程的合理场变量分布规律。
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4. The results show that the critical rotate speed is dependent of the critical pressure, the casting highness, the metal melt weight and the character of fibrous preform.
结果表明，金属液浸渗纤维预制体的临界转速只与临界压力、金属液的浇注量、铸件高度以及纤维预制体性质有关；
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5. This paper establishes, from a geometrical-optics point of view, a theoretical formula for calculating the refractive index profile of a preform by forward scattering.
本文从几何光学出发，建立了利用预制棒的前向散射决定预制棒芯折射率分布的理论公式。
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6. The future development trend of preform preparation methods are also predicted.
对目前预制块制备技术的发展方向进行了展望。
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7. 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；
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8. This paper presents a summary on studies of factors which influence the quality of finished parts based on permeability of fibrous preform, voids or dry spots and residual stress.
纤维预制体的渗透性、孔穴或干斑的形成、残余应力的形成是影响成品质量的三个主要方面，本文对研究中存在的问题，进行了总结和评述。
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9. The structure of preform is described, the processing parameters are predicted in theory and the designs of functional and structural composites are provided by the method of topological analysis.
本文用拓扑分析方法，对预制件结构做了说明，并对工艺参量进行了理论预测，为设计功能复合材料和特殊结构复合材料提供了新的手段。
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10. The distribution laws of pressure and density in pressing process of ring preform are researched in the paper.
研究了环形粉末预制坯压制过程中压力和密度变化规律。
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11. The Effects of carbon fiber content on microstructure of preform, densification and mechanical properties of C/C composites were investigated.
研究了炭纤维含量对预制体微观结构、致密化过程及力学性能的影响。
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12. 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。
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13. The experimental results show that the compressive strength of preform increases with the increasing of fiber volume fraction and binder mass fraction.
试验结果表明，氧化铝短纤维预制件的抗压强度随着纤维体积分数的升高而升高，随着黏结剂质量分数的提高而升高。
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14. An algorithm of three-dimensional braided composite material preform image processing 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。
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15. Using needled-carbon fiber felts as the preform, C/C composites were fabricated mainly by chemical vapor infiltration(CVI) and subsidiarily by liquid resin or pitch impregnation.
复合材料的制备以全炭纤维准三维针刺毡为预制体，采用化学气相渗透（CVI）为主、液相树脂或沥青浸渍-炭化为辅的复合增密技术。
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16. The flow front of ZL109 melt in mullite chopped fibre preform during melt infiltration was investigated with a method called stopping squeeze casting.
用中断挤压铸造法研究了ZL109合金液在莫来石纤维预制块中的流动状况。
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17. 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。
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18. The porosity of porous Al-Si alloy is 40~80% and percentage of open-cell is above 85%, bom of which vary with the fabrication process of preform.
孔隙率在40～80%，孔隙连通率在85%以上，孔隙的大小和孔隙率取决于预制块的制备工艺。
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19. 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。
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20. 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。
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21. 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。
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22. 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。
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23. 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。
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24. 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。
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25. Microstructures of the preform and the composite were analyzed under SEM and TEM.
利用SEM和TEM等方法对晶须预制块和复合材料进行了微观组织结构分析。
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26. To clarify on site all open questions on bottle design, preform &bottle performance (spec) in order to run smooth and effective mold projects.
为了顺利有效运作模具项目，需在现场阐明所有涉及瓶子设计，瓶坯与瓶子匹配性的问题。
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27. The extrudate shape, dimension and output can be effectively controlled on single roller extruder with its variable screw and roller speeds and the flexible combination of preform die and final die.
单辊筒口型挤出机通过变更挤出机螺杆和辊筒转速及灵活的预成型口型和终端口型设计组合可以有效控制挤出物的形状、尺寸和生产率。
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28. Condensate will leave marks on the preform surface.
露水会遗留痕迹在瓶坯的表面上。
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29. On the basis of experimental data, a densification rate mode to describe the woven preform deposited in the thermal gradient CVI process was put forward.
主要是关于热梯度化学气相过程中预制体致密机理的探讨。
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30. On the basis of experimental data, a densification rate mode to describe the woven preform deposited in the thermal gradient CVI process was put forward.
主要是关于热梯度化学气相过程中预制体致密机理的探讨。
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31. 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。
-- 来源 -- www.ilib.cn
32. Preform heating device
预成形加热器
-- 来源 -- 英汉 - 翻译样例 - 产品
33. sealing preform
密封用塑扭塑
-- 来源 -- 英汉 - 翻译参考[网络]
34. die attach preform
芯片安装用框架
-- 来源 -- 英汉 - 翻译参考[网络]
35. eutectic preform
共晶合金盘料
-- 来源 -- 英汉 - 翻译参考[网络]
36. 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。
-- 来源 -- dyjs.nextage.cn
37. laminated preform
叠层预成型物
-- 来源 -- 英汉 - 翻译参考[网络]
38. The preform for FGH95 turbine disk forging was designed by using the preform optimization prototype system developed by the authors, the obtained results were satisfied.
应用根据这种方法所建立的锻件预成形设计原型系统，对FGH95合金涡轮盘锻件用坯料进行预成形设计，取得了令人满意的结果。
-- 来源 -- dyjs.nextage.cn
39. preform heading punch
初镦冲头
-- 来源 -- 英汉 - 翻译参考[网络]
40. gold silicon preform
金 硅共晶塑扭塑
-- 来源 -- 英汉 - 翻译参考[网络]
preform
