大学英语词汇短语释义解析及例句 concave surface
释义：
concave surface 凹面，内弧面
例句：
A longitudinal channel extends along the concave surface.
纵向通道沿所述凹面延伸。
The front of ancient bronze mirrors has flat and concave surface .
古代青铜镜的镜面有平面的，也有凸面的。
This paper investigates the inverted L antennas mounted on a conducting concave surface.
系统地研究了架设在凹形接地面上的倒l天线的电特性。
Topography: Hengyang City in Hunan Province, with a part of the concave surface of the shaft.
地形地貌：衡阳市处于湖南省凹形面的轴带部分。
Cylinder and enlarged blades are used as test models for simulating the leading edge and concave surface of the blade.
用圆柱和放大的叶片做模型，模拟叶片前缘和叶盆凹面的流动。
The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.
运用质心运动定理，分析了质点在可自由移动的凹曲面上滑下时，质点对惯性系的运动轨迹方程。
The second aspect is related to a new configuration of open-ended coaxial probe proposed for concave surface materials testing.
第二方面的研究是提出一种改进型结构的开口同轴探头技术。
There are natural cotton crystal, mineral, concave surface, the natural normal function of any minor damage, is not a quality problem.
天然水晶内有棉絮、矿质、冰裂、表面凹点、天然轻微破损都属正常现象，不属品质问题。
It arises on both sides from the concave surface of the kidney known as the hilum. It is between 20 and 30cm long and can be affected by a number of disorders.
输尿管起始于两个肾脏的凹面(也就是肾门)，长20到30厘米，可能会受到一些病症的影响。
Hengyang City in Hunan Province concave surface of the shaft, surrounded with a ring of intermittent ridge mountain ridge, a typical situation in the basin.
衡阳市处于湖南省凹形面的轴带部分，周围环绕着断续环带属岭脊山地，构成典型的盆地形势。
For PCWs with different degrees of concaveness, the power reaches about 80% at different focusing points when the morphology of the concave surface is optimized.
通过对褶皱表面的形貌优化，我们得到了不同曲率半径的高质量光子晶体波导聚焦器件，聚焦能量达到80%以上。
This device is structure compactness and reasonable, it can satisfy the practical requirements and raise the efficiency for grinding the concave surface of the spare parts.
该装置具有结构紧凑、合理的特点，能满足实际需要，可大大提高零件凹表面的打磨效率。
The structure plate is composed of high-elastic structure, which is provided with an edge raised line, a middle raised line, a bottom flat surface and a bottom concave surface.
由高弹性结构构成，高弹性结构上设置有边凸条、中凸 条、底平面、底凹面；
This paper presents an approach to machine steam turbine blades in 5-axis NC. By means of using a disc cutter with a concave end, curvature fitting is used to machine the convex and concave surface.
提出了一种汽轮机叶片五轴数控加工的实用方法，对于叶背和叶盆采用中凹盘形铣刀，基于密切曲率法给出优化刀位轨迹的计算方法；
