Two methods and devices which are changeable aperture and movable aperture for measuring the mode-field radius of single-mode optical fibers are presented.
介绍两种快速测量单模光纤模场半径的方法及其测量装置——可变孔径法和移动圆孔法;即用步进电机带动在光纤端面远场区域放置的一个透光圆孔屏障移动,或者改变透光圆孔的大小,从而调节PIN管接收到的光强度。
variable hole fruit grader
可变孔径的水果分级机
Internal friction behaviors of porous NiTi alloys with variable porosities
可变孔隙率多孔NiTi合金的内耗行为
magnetic transmission variable aperture flow meter
磁力传动可变孔径式流量计
a disk having a fixed or variable opening used to restrict the amount of light traversing a lens or optical system.
"具有固定或可变孔的圆盘,用来限制穿过透镜或光学系统的光量."
Even human beings could become gods. For example, Chinese folk heros such as Guan Gong, Zhuge Liang and Yue Fei.
连人都可以变神，像关公、孔明、岳飞就是。
The human eye has a pupil diameter which, of course, varies.
人眼瞳孔直径当然是可变的。
Both variable orifices and electromagnetic controllers have been used with success.
可变锐孔和电磁流量控制器都已成功地使用。
Parameter Influence Analysis of Solute Transport in Deformable Porours Media
可变形多孔介质溶质运移的参数影响分析
High variability was found in the interstitial water using a1 cm resolution device. Nitrate was never detected in the pore water.
用1厘米的分辨率在孔隙水中发现了高可变性。在孔隙水中未检测出硝酸盐。
These micro-fissures and other defects act to make the continuous film or coating of paint more porous.
这些裂缝和其他污染物可以使漆面变得多孔渗水。
VARIATIONAL PRINCIPLES AND FINITE ELEMENT METHOD OF INCOMPRESSIBLE SATURATED POROELASTIC BEAM
不可压流体饱和多孔弹性梁的变分原理及有限元方法
die approach angle
(模孔第二部分) 模孔变形锥
Analysis of changes of pressure before the orifices in laterals under low pressure drip irrigation
低压滴灌小孔出流孔前压力变化研究
Adapter, male-female. Male-male can be specified.
适配器，插头－插孔。可指定插头或插孔。
You may visit Confucius Mansion, the Great Hall of Confucius and the Temple of Confucius.
您可以参观孔府，大成殿和孔庙。
This machine can be used drilling,core drilling, reaming,boring,tapping, spot-facing and chamfering etc.
可以进行钻孔、扩孔、铰孔、镗孔、攻丝、锪平面，倒角等工作。
The face seemed to be beaming with a kindly smile.
面孔看来笑容可掬。
a quick snort of cocaine
用鼻孔匆匆吸些可卡因.