The shapes of initial roof caving and periodic caving are of triangle and parallelogram plate texture.
通过三维相似材料模拟试验,得到走向短壁水力采煤顶板周期垮落规律:顶板初次垮落及周期垮落的形状分别为三角形板结构和平行四边形板结构,垮落线与煤层走向呈一定角度。
Dynamics modeling of low-speed maglev train and analysis of the parallelogram mechanism
低速磁浮车动力学建模及平行四边形机构分析
The principle of the detecting system with parallelogram mechanism is presented,and the detecting results of scrape wheel are achieved through test and data processing.
简述了检测车轮踏面擦伤状态的重要性、擦伤定义及标准,介绍了平行四边形机构检测系统的检测原理,并通过试验和相关数据处理得到擦伤车轮检测结果,最后用MATLAB编写算法实现擦伤信号的判定且进行了算法的误差分析。
The parallelogram mechanism can move flexibly when the two teams of substance are the same respectively.
平行四边形机构的两组对边分别相等,以保证机构不别劲,运动灵活。
Extending of parallelogram mechanism and its application;
平行四边形机构的拓展及其应用
Formulation of C_1 Conforming Parallelogram Thin Plate Element;
C_1阶协调平行四边形薄板单元的构造
This paper has put forward three sections of parallelogram、erect traperzium and hollow rectangle,in order to resolve this problem.
冲天炉炉胆径向胀裂问题,也是一道颇有难度的课题,本文提出:用平行四边形、竖立的梯形和微凹矩形三种炉壁断面作为防止措施。
Analysis of Synchronous Welding Positioner Based on Ogram Mechanism;
基于平行四边形机构的同步式变位焊接机分析
Dynamics modeling of low-speed maglev train and analysis of the parallelogram mechanism
低速磁浮车动力学建模及平行四边形机构分析
parallelogram illusion
平行四边形错觉 平行四边形错觉
A quadrilateral having no parallel sides.
没有平行边的四边形
double link jib in parallelogram
平行四边形组合臂架
fundamental period parallelogram
原始周期平行四边形
parallel motion linkage
平行四边形悬挂装置
primitive period parallelogram
基本周期平行四边形
primitive parallelogram of period
周期的原始平行四边形
a parallelogram with four equal sides; an oblique-angled equilateral parallelogram.
四个边相等的平行四边形；不是直角的等边平行四边形。
A quadrilateral having two parallel sides.
梯形一个有两条平行边的四边形
A trapezoid is a quadrilateral with two parallel sides.
梯形是具有两平行边的四边形。
Research on Dynamic Design for High Performance Parallelogram Manipulator
高性能平行四边形机械手动态设计方法研究
A four-sided plane figure with opposite sides parallel.
平行四边形一种有四条边且每两条边对应平行的平面图形
(in US) a quadrilateral with no parallel sides.
（在美国）没有平行边的四边形。
(in US) a quadrilateral with two parallel sides.
（在美国）有两个平行边的四边形。
a quadrilateral whose opposite sides are both parallel and equal in length.
相对的边平行且长度相等的四边形。
a parallelogram with four right angles.
有四个直角的平行四边形。