凹形

The company has advanced mechanical equipment and strong technical force, capable of producing: 8-300mm range of straight profile, meta curved, staggered tooth shape, the overall level of tooth carbide saw blade milling cutter, cutter blade on three sides, convex semi-circular cutter, concave semicircle cutter, angle cutter, Slitter knives.

公司拥有先进的机械设备及雄厚的技术力量，能够生产：Φ8-300mm各种直齿形、元弧形、交错齿形、高低齿形整体硬质合金锯片铣刀、三面刃铣刀、凸半圆铣刀、凹半圆铣刀、角度铣刀、分条刀等。

The said Martinez stretcher comprises concave spherical reflecting lens, plane reflecting lens and grating. The said compressor comprises plane reflecting lens, inner right angle reflecting lens and grating, which is characterized by the following: the grating fringe density of the stretcher is larger than that of the compressor.

所述的马丁内兹展宽器由凹球面反射镜、平面反射镜和光栅组成；所述的压缩器由平面反射镜、内直角形反射镜和光栅组成，其特征在于，展宽器的光栅条纹密度大于压缩器的光栅条纹密度；展宽器中的凹球面反射镜曲率半径位0.9～1.2米，光栅距凹球面反射镜的位置为凹球面反射镜曲率半径的1/3～1/2。

Leaves sessile; blade broadly oblong or oblong-ovate to narrowly oblong or oblong-lanceolate, 2-6.5(-8)× 1-3.2 cm, thickly papery, abaxially rather paler but not glaucous; laminar glands dense, unequal dots or short streaks; intramarginal glands dense; main lateral veins 4-6-paired, with densely reticulate tertiary venation not or scarcely prominent abaxially; base cordate-amplexicaul, apex rounded to shallowly retuse.

叶无柄 叶片宽长圆形或长圆状卵形到狭长圆形或长圆状披针形， 2-6.5(-8)* 1-3.2 厘米，厚纸质，背面相当浅但不是苍白；片状腺体浓，不相等的小圆点或者短的条纹；近边缘内腺体浓； 4-6配对的主要侧脉，突出的具密网状第三脉不或几乎不；抱茎基部心形，先端圆形对浅微凹。

Based on the former drag reduction experiments of the bionic nonsmooth body of revolution models in the lowspeed wind tunnel, the simulation wind tunnel tests at the wind speed of 44 m/s were performed for the body of revolution models with the tail rectangularly disposed by three different nonsmooth structures, such as the convex dome form with the diameter/height of 1.0/0.5 mm, the dimple concave form with the diameter/depth of 1.0/0.5 mm, and the riblet form with the width/height of 1.0/0.5 mm, in contrast with the body of revolution model with smooth surface.

在前期进行的仿生非光滑旋成体模型低速风洞试验的基础上，将非光滑形态在旋成体模型上的排列方式固定为矩形布置，非光滑的尺寸固定为直径或宽度为1 mm，深度或高度为0.5 mm，在风速为44 m/s时，对布置在模型尾部的凸包形、凹坑形和棱纹形三种非光滑模型与表面光滑模型进行了对比模拟试验。

The changing rule of the deformed zone and non-deformed zone in the process of bending the vee parts is analyzed.

分析了V形件弯曲过程中变形区与非变形区的变化规律，建立了计算凹模最小深度的公式，并通过数值实例，讨论了工件尺寸与凹模圆角半径对弯曲凹模最小深度的影响。

Cordate Heart-shaped, usually referring just to the base of leaves, e.g.

心形：心形的叶片，与卵形相似，但叶片下部更为广阔，基部凹入成尖形。

Corona lobes shorter than corolla; leaves ovate, deltate-ovate, hastate, or hastate-cordate, basal sinus shallow or, if deep, lobes parallel or divergent.

副花冠裂片短于花冠；叶卵形，卵形的三角形，，或戟形心形，基部凹缺浅或，如果深，裂片平行或分叉。

It is widely employed in many industrial domains. The most attractive domain of ring rolling technology is to roll the rings with specially-shaped cross section directly. But the rolling deformation law of ring with specially-shaped cross section is more complicated compared with rectangle section ring and in the process there are lots of special phenomenon such as underfilling, shrinking-drawing, concave, saucer shape and etc.

环件轧制技术最有吸引力的领域和发展方向是直接轧制成形截面轮廓复杂的异形截面环件，然而，与矩形截面环件相比，异形截面环件轧制成形规律更复杂，轧制过程中常常出现截面轮廓充不满、拉缩、凹坑、碟形等各种特有现象，这些现象是异形截面环件轧制成形规律的客观反映。

Glass and its products: watches and glasses presenting arc, curved and concave shape, glass without optics-processing presenting arc, blending and concave shape and some unlisted and without optics-processing but presenting arc blending and concaved shape.

玻璃及其制品：呈弧面、弯、凹等形的钟表、眼镜，其他未经光学加工呈弧面、弯、凹，未列名未经光学加工呈弧面、弯、凹等形玻璃。

In effect, the inner part of the cup was made a slope of hollow heart shape.

它其实就是将原本的心形内凹做成由上到下逐渐增高的斜坡，当咖啡是满杯的时候看不出心形，而只有慢慢将咖啡喝完，才能逐渐显露出来，剩下的越少，心形也就越明显。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。