top cavity

Secondly, we add a resonant cavity constructed by the top and bottom distributed Bragg reflectors ( DBRs) to the GaAs/ AlGaAs LED, the dependences of NIR photon extraction efficiency on the DBR parameters have been studied.

然后在GaAs/AlGaAs LED顶部和底部分别加上分布式布拉格反射镜（DBR）构成谐振腔，研究了DBR谐振腔存在时LED的光子出射效率。

Gating arrangements may also be made at the top or bottom of the cavity.

给装门的安排也许并且被做在洞的上面或底部.

Taking 195T piston mould as an example, this paper studies the problem of contraction cavity encountered during the production of thick-top pistons.

以195t活塞模具为例，研究了在生产厚大顶部活塞毛坯时所遇到的缩孔问题。

The reason resulting in contraction cavity in top of 195T piston combustion chamber in practice was analyzed, and the countermeasures of eliminating the contraction cavity were taken.

研究了在生产195T活塞毛坯时所遇到的燃烧室顶部缩孔问题，对其产生原因进行了分析，并提出了消除缩孔所采取的措施。

It is concluded through analysis that the combustion chamber contraction cavity of the thick-top piston is mainly caused by the defect of the mould and the inefficiency of the water-cooling system.

经过分析得出结论：造成厚大项部活塞毛坯燃烧室缩孔问题的主要原因是由于模具本身的弊端和水冷系统效果不佳。

The top part of cavity is removed to form open coaxial quasi-optical cavity.

把曲面镜顶腔部分去掉，就形成了开放式同轴型准光腔。