凹角

A small corner, alcove, or recess, especially one in a large room.

角落小角，凹处或隐窝，尤指在一间大屋子里

The panel and back are flat, Guoqin body and inside the waist no concave angle.

其面板与背板都是平的，琴身腰部无角而往里凹。

But the strength of the cartridge case after ironing drawing cannot be accurately calculated by this formula,because the result of calculation is lower than that reached in practice.

用常规的幂强化公式计算药筒在引伸后的强度时，数值偏低较多，原因是该公式未考虑引伸凹模锥角对强化的影响。

Marc software, the two-dimensional simulation of isothermal extrusion forming process of globoidal cam was made. The influence of the different model cavity concave wedge angle a on the performance of filling billets was analyzed. It provided an important basis for the realization of cambered cam isothermal compression and the optimization of die structure.

用MSC。 Marc软件对弧面凸轮等温挤压成形过程进行了二维模拟，具体分析了不同凹模型腔楔角α对坯料填充性能的影响，为实现弧面凸轮等温挤压成形和优化模具结构提供了重要依据。

Based on the method of numerical simulation, the diameter of steel billet, entrance half angle of concave die and the dimension of spline were analyzed for the forming force on the spline processing with the help of a rigid-plasticity finite element software Deform 3D.

借助刚塑性有限元软件Deform-3D，采用数值模拟的方法分析了矩形花键轴冷挤压过程中，坯料直径、凹模入模半角及键齿尺寸对花键成形力的影响。

Wedge mechanism was adopted in piercing die to achieve side piercing, and the positioning of taper pipe depended upon the conical surface of blanking die itself.

在冲孔模中选用了带有楔角的斜楔机构来实现侧冲，并利用冲裁凹模自身的锥形面实现了锥形管的定位。

Perianth subglobose, hemispheric, or urceolate, 5-parted or -lobed, slightly fleshy or herbaceous; segments abaxially thickened or becoming winglike or hornlike, rarely not modified, adaxially concave or cucullate.

花被近球形，半球形，或者瓶形，5深裂或者浅裂，稍肉质或草质；背面的裂片加厚的或变得翅状或角状，很少不修改，正面凹或兜状。

Considering the effect of load and helical angle on the instaneous width of contact area, this paper uses the BEM program for calculating the deformations at different place along the width of convex tooth and concave tooth of W-N gear and gets the relevant deformation curves.

并首次应用三维边界元方法，在计入齿面瞬时接触迹宽度随外载、螺旋角而变化的条件下，计算了双圆弧齿轮凸齿面端部和凹齿面端部的变形。

Cross recessed hexagon bolt with indentation, single coil lock washer and plain washer assemblies

十字槽凹穴六角头螺栓，弹簧垫圈和平垫圈组合件

Results After all the patients were treated with maxillary protraction ,facial angle decreased,H angle increased,Ls move forward,Ss move forward, anterior lower face height increased, and the changes had statistics significance.

结果 本研究24例骨性III类错牙合，经上颌前方牵引器矫治后，患者软组织面角减小，H角增大，上唇突点前移，上唇凹点前移，下面高增加，且有统计学意义。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。