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。
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