In this episode of Depths of History, we explore a Civil War battle site that lasted only 90 minutes, uncovering both Union and Confederate relics through metal detecting. The video features the ...

Introduction: The Thrill of the Hunt Imagine walking across a field, the sun setting on the horizon, and suddenly, a sharp, ...

该产品为渐变折射率（GRIN）透镜，具有高功率激光二极管和高亮度二极管光束整形功能，适用于光纤耦合，并具备良好的同轴和离轴性能。由杭州谱镭光电技术有限公司提供，该公司专注于科研仪器的代理与销售，涵盖多个应用领域。GRIN透镜通过银离子或锂 ...