凹的

Sedimentary basins vary from bowl-shaped to elongated troughs. Basins can be bounded by faults.

沉积盆地的形态可为盘状至纵长形凹槽；可以断层为界。

Culm sheaths brown-red when fresh, with sparse or rather dense small spots, distal margins dark purple

没有腺毛的花梗和萼片；种子肾形三角形，具凹槽 56

Cement walls painted in a layer of paint will add warm bath degrees, and the mosaic glass tiles, tile patterns, and even the tongue and groove boards to deal with the design can make the walls more interesting.

在水泥墙上涂上一层油漆会使浴室增添暖度，而马赛克玻璃砖，刻花磁砖，甚至板舌以及凹槽处理都能使墙壁的设计更为有趣。

In order to prolong the service life of roller bearing, a deep end-cavity roller is applied to roller bearing of cone bits.

国内现有牙轮钻头滚动轴承多采用短圆柱滚子轴承结构，滚子边缘处存在应力集中现象，使得轴承接触表面极易发生疲劳破坏，为提高牙轮钻头滚动轴承抗接触疲劳寿命，提出在牙轮钻头滚动轴承中采用凹端圆柱滚子的方案。

In China, the roller bearing cone bit is now equipped with short cylindrical roller, which has stress centralization on the edge, and it easily causes fatigue failure on the contact area.

国内现有牙轮钻头滚动轴承多采用短圆柱滚子轴承结构，滚子边缘处存在应力集中现象，使得轴承接触表面极易发生疲劳破坏，为提高牙轮钻头滚动轴承杭接触疲劳寿命，提出在牙轮钻头滚动轴承中来用凹端圆柱滚子的方案。

In China, the roller bearing cone bit is now equipped with short cylindrical roller, which has stress centralization on the edge, and it easily causes fatigue failure on the contact area.

国内现有牙轮钻头滚动轴承多采用短圆柱滚子轴承结构，滚子边缘处存在应力集中现象，使得轴承接触表面极易发生疲劳破坏，为提高牙轮钻头滚动轴承抗接触疲劳寿命，提出在牙轮钻头滚动轴承中采用凹端圆柱滚子的方案。

According to the velocity filed mentioned above, the contour of the drawing die was rationally designed. To prove its applicability and superiority, FEM software, MARC and SUPERFORM, were used to simulate the drawing process of cross tube in "conical die" and "streamlined die".

本文以十字形钢管为研究对象，开展对异型钢管拉拔成形过程研究，首先结合挤压流线理论，设计了&流线型&拉拔速度场模型，这为改善金属流动状态、降低能耗创造了良好条件；紧接着以&流线型&速度场为理论依据，对十字形管拉拔模具的凹模轮廓进行了合理设计。

With advanced processing equipment, with computer design, crystal cutting, plane grinding, crystal press type, laser laser, vacuum plating, punching fight concave, crystal sand blasting, computer water-cutting, straight-edge technology and other advanced hypotenuse .

拥有先进的加工设备，具有电脑设计，水晶切割，平面精磨，水晶压型，镭射内雕，真空镀彩，打孔打凹，水晶喷砂，电脑水割，直边斜边等先进工艺。

The result of the theory analysis and test study determines the important parameters and action law of the detonating fuse , metal flat tube ,notch bolt and separation plate in the separation device of the expansion tube.

2通过理论分析和试验研究，确定了膨胀管分离装置中导爆索、金属扁平管、凹口螺栓、分离板的重要参数和作用规律。

After an investigation on the rules of this deep drawing process, a virtual orthogonal experimental design is adopted to determine the significance of processing parameters, die radius, blank holder force and friction coefficient, on the forming process.

同时，采用正交试验分析方法，研究了单位压边力、摩擦系数、凹模圆角半径和凸凹模间隙等工艺参数，对该拉深成形过程的影响规律。

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。