In order to design a Planar Waveguide Concave Diffraction Gratings(PW-CDG) accurately,especially a special grating structure,a design method named Modified Recursive Definition of Facet Positions(MRD) was presented.
为了精确设计平板波导凹面衍射光栅,提出了改进的刻槽位置递推计算方法。
A recessed panel in such a ceiling.
花格平顶的凹板在这样平顶上的凹形窗格
A print or engraving made by using such a plate.
铜凹版印刷品用铜凹板印制的印刷品或版画
A plate used in the process of gravure.
凹版印刷板凹版印刷过程中使用的板
A raised or sunken rectangular panel on a wall.
镶板墙面上凸起或凹陷的长方形嵌板
A groove down the side of a piece of type used to ensure that it is correctly placed.
凹纹沿着模板的一道凹线，用来保证正确的放置
To supply(a ceiling, for example) with decorative sunken panels.
用饰板装饰提供（例如给天花板）下凹的装饰镶板
He hammered out the dents in the mental sheet
他把金属板上的一些凹痕锤平了。
I found a dent in the left wing of your car.
我看见你车左侧的翼子板上有块凹痕。
A fender that dents easily.
一面很容易有凹痕的挡泥板
Water collected in the crateriform hole in the floor.
水聚集在地板上那漏斗状的凹洞里。
notchedunderlated preheater
凹槽波纹板回转式空气预热器
Horizontal intermediate cross rails, which are required for locks, will be recessed and concealed.
水平过渡交叉挡板应扣住，凹入并隐藏。
an intaglio plate engraved with a sharp steel needle.
上面刻有一个尖锐的钢针的凹版印板。
beat out the dent in the car's wing
锤平汽车挡泥板上的凹痕.
Please strike up a dent in the medal (of a fender).
请在（防护板的）金属上敲出凹痕。
glove compartment
ph.1. 汽车仪器板上放杂物的凹
The number shall be cut in on a plate.
号码将凹雕在一块金属板上。
semi - trailer kangaroo
袋鼠形半拖车(装在凹形底板的平车上)