form thick forests是什么意思

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用法例句

Gap formation features of humid evergreen broad-leaved forest in central subtropical Wawushan Mountain,Sichuan Province,China.;

瓦屋山中亚热带湿性常绿阔叶林的林窗形成特征

Designing of semifinished product for spur gear precision forming;

齿轮精密成形精整毛坯设计

Principle of precision forming for sandwich panel of large antenna reflector;

反射器夹层面板精密成形原理

It was presented that a new precision forming technology of car steering knuckle in this paper.

文章提出了轿车转向节精密成形新工艺。

The research and development of the digital precise forming system;

数字化精密成形系统的研究与开发

In order to simulate the precise forming of a double curvature panel based on "nails die, vacuum and honeycomb sandwich" by the finite element method, a simplified mechanical model for the two forming phases is established.

为了实现基于“点阵钉模、真空负压、蜂窝夹层”的双曲度面板精密成形过程的有限元数值模拟 ,分析了成形 2个阶段的变形过程 ,建立了简化的力学模形 ,以一种广义协调薄板弯曲四边形位移单元为基础构造了具有公共横向位移自由度的几何非线性四边形四节点分别考虑和不考虑横向剪切的多层板单元 ,通过牛顿 -拉斐逊法结合载荷、位移约束量的增量法求解几何非线性方程 ,较好地再现了真实成形过

MARC finite element method s used to numerical simulate the process of deformation and densification of porous powder sintering materials,and the influence of different initial conditions(relative density,relative height and frictional factor) on law and mechanism of deformation and densification is studied.

MARC对多孔体粉末烧结材料锻造镦粗成形致密过程进行了数值模拟,研究了不同初始条件(相对密度、高径比、摩擦因子)对粉末锻造成形致密规律及致密机制的影响,并对其结果进行了分析,为预成形坯和模具的优化设计提供理论依据。

The Deformation Property of Casting AZ31 Mg Alloy and Precision Forming of Inner Spur Gear;

连铸AZ31镁合金成形性能及内齿轮精密成形研究

The Digital Manufacturing Method of Engineering Composite Precision Forming;

工程复合材料精密成形数字制造方法

PREDICTION OF NOOE SEPARATING FROM DLE IN TUBE AXIAL COMPRESSIVE PRECISION FORMING PROCESS

管轴压精密成形过程中管坯脱模点的预测

Study on Warm Precision Forging of Spur Gears with Big Modulus and High Boss

大模数高凸台圆柱直齿轮温精密成形技术研究

Simulation Study on the Characteristics of Medium Carbon Structural Steel during Semi-Hot Controlling Precision Forming;

中碳结构钢亚热控制精密成形特性模拟研究

Technology Research on Warm Extrusion Process of Cutting Pick Body in a Coal Mining Machine;

采煤机截齿刀体温挤压精密成形工艺研究

Study on New Obturated Extrusion Precision Forming Technology of Car Steering Knuckle;

轿车转向节闭塞挤压精密成形新工艺研究

FEM Numerical Simulation of Precision Forming Process of Tube Inversion by Axial Drawing;

拉伸翻管精密成形过程有限元数值模拟

Research on Gear Precision Forming Process and It s CAD/CAPP System;

齿轮精密成形工艺研究及其CAD/CAPP系统开发

Study on the Precision Forming of HAI 60-1-1 Aluminum Brass Thrust Bearing Blocks

HAI 60-1-1铝黄铜止推轴承座精密成形研究

Research on Precise Warm Extrusion of Pick Used in Engineering and Mining

工矿及采矿用截齿温挤压精密成形工艺研究

Test Research on Chip Formation of Ultra-precision Turning

超精密车削切屑形成过程的试验研究

Study on Optimization of Precision Die Forging Process of Automobile Crankshaft;

汽车曲轴精密模锻成形工艺优化研究

Precise Extrusion Process of E Shaped Waveguide Component for Radar Use

雷达用E弯波导体精密挤压成形工艺

A Study on Elastic Deformation Forecast Method for Precision Plastic Forming

精密塑性成形弹性变形量预测方法研究

Magnesium Alloy Precision Die-casting and Mould Design & Manufacture;

镁合金精密压铸成形工艺及模具设计制造

Study on Precision Forging Process and Die of Tiny-Automobile Cranshaft;

微车曲轴精密锻造成形工艺及模具的研究

Modeling and Simulation of Scratches during the Process of Ultra-Precision Plane Grinding;

超精密平面研磨划痕形成的建模与仿真