Heat resistant and extreme hardness Micro-crystal plate.
高硬度微晶板,耐高温;
The crystal plate must be thin so that we are able to see a source of light through it.
晶体的薄片必须薄得使我们通过它可以看见一个光源。
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。
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