preform的过去式

preform

[pri:'fɔ:m]

vt.预先形成;

n.粗加工的成品;

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

例句:

1、

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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2、

Transverse feeding of molten metal in continuous fiber preform was investigated theoretically and experimentally.

研究了金属液在连续纤维预制型中的横向补缩.

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3、

A preform shape can be gained with backward simulation from the final bladeshape based on FEM.

为此,本文介绍了有限元反向模拟的基本步骤,综述了确定反向模拟中边界节点脱模准则的方法.

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