梯形的

The materials-air circulation is existed in the ginding chamber of hammer mill when grinding materials.It led to lower production ,higher consumption of energy and particle inhomogeity.Aiming at materials-air circulation ,the special type grinding chamber that is made up of trapezium screen was proposed. It can destroy circulation lay effectively and raise grinding capbility.

针对锤片式粉碎机工作时粉碎室内存在物料-空气环流层，导致其粉碎效率低、能耗高，且粉碎物粒度不均匀，提出使用梯形筛片构成的异型粉碎室来改善锤片式粉碎机的性能。

The authors adopted the software of finite element to simulate rock tension fracture, gave the breakdown of extensional criterion, selected the round, arch wall, rectangle, trapezoid and hemicycle as the simulation models and obtained the tension fracture forms of different shape chambers.

采用可模拟拉张破裂的有限元软件，给出拉张破裂的判据，分别选取圆形、直墙拱形、长方形、梯形、半圆形硐室模型进行拉张破裂有限元数值模拟。

According to the requirements of precision conformal dose delivery in radiation therapy, the focused trapezoid cross-sectional shape of the flank leaf of multi-leaf collimator is introduced, and the tongue-groove structure, which is used to minimize interleaf transmission, is determined.

根据放射治疗中剂量精确适形的要求，确定了多叶组合光栅叶片侧面的梯形聚焦形式和榫槽配合防漏射结构。

The middle is a very strange pattern: sharp 2 outwards, turning it from the middle of a point, it becomes a two isosceles trapezoid.

中间是一种很奇怪的图案：尖尖的两头朝外，把它从中间一分，就成了两个等腰梯形。

A long tapering spar slung to a mast to support and spread the head of a square sail ,lug sail ,or lateen.

帆桁吊在桅杆上一头渐细的长柱，用来支撑和展开横帆、梯形帆或三角帆的顶端

The changes in PAL and PO activity and in cellulose and lignin contents were studied. The results indicated that the activities in PAL and PO and contents in cellulose and lignin increased by a big margin, and the course of lignification was moved forward from shoot base to top.

结果表明：PAL和PO活性以及纤维素和木质素的含量从基部向顶部逐渐降低，呈梯形分布，木质化进程是从基部向顶部推进的；竹笋离体后，PAL和PO活性大幅度增高，纤维素和木质素含量大量增加加速了老化进程。

The conclusion which both software-cell and logical relation are the element factors for LD is presented.

给出了关系表的概念，提出了通过生成关系表描述嵌套关系并简化梯形图的方法。

A quadrilateral or triangular sail set from the after part of the mainmast on a fore-and-aft rigged vessel.

帆桁吊在桅杆上一头渐细的长柱，用来支撑和展开横帆、梯形帆或三角帆的顶端

And the Trapezoidal Fuzzy AHP expresses the element of judgment matrix and its weights in trapezoidal fuzzy numbers.

最后，给出了梯形模糊层次分析法的基本步骤并提供了该法在卫星方案优选中的应用实例。

This design aims at its organization characteristics in analyzing a MMD double-roll crusher toothed falling in pieces the foundation of mechanism, making use of a trapezoid method to deduce a calculation should grow the crusher basic parameter to estimate formula.

本设计在分析MMD双齿辊破碎机破碎机理的基础上，针对其机构特点，利用梯形法推导出计算该种破碎机基本参数的估算公式。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。