Ghost ring sight 鬼环式瞄准具
speed ring sight [航] 航速显示瞄准环
bank ring sight 环状坡度指示器
ring sight pointer 环形指示器
Ghost t ring sight 鬼环式瞄准具
A CRYSTAL RING SIGHT 晶体光环瞄准镜
ring-and-bead sight [军] 环珠瞄准具
front sight ring 准星护圈
ring and bead sight 圆环与准星瞄准具
Principle and design of a ring sight consisting of calcite crystal plate and polarized elements are proposed.
本文介绍一种光环瞄准镜的原理和设计，它是用方解石晶体薄片和偏振器件组成。
The ring sight presents a set of concentric rings when it is illuminated by the target and the background. Brightness of the rings is in proportion to that of the target and the background.
在目标光和背景光的照射下，呈现出一组同心圆环，其亮度与目标和背景的亮度成正比。
But, for answer, the old man only held his lanthorn up, so that in the ring of its pale light they saw some sight or other in the street.
不过，作为答复，老人只是把灯笼高高提了起来，好让他们在那黯淡的光圈中能见到些街上的景象。
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