The OM System M.Zuiko Digital 17mm F1.8 II is a tiny lens with a big feature set, including snappy autofocus, IPX1 drip ...

The M.Zuiko Digital 25mm F1.8 II ($499.99) updates a decade-old lens, the original Olympus M.Zuiko 25mm F1.8, with upgraded ...

消防防护服装阻燃测试仪的工作原理‌是基于热传导和燃烧原理。在测试过程中，将防护服材料置于测试仪器中，通过高温加热，观察材料的燃烧情况。测试仪通常采用热传感器和高速摄像机来记录测试过程，包括样品表面温度、热释放速率、燃烧程度和烟密度等参数‌。

H.H. Sheikh Saud bin Rashid Al Mu'alla, Supreme Council Member and Ruler of Umm Al Qaiwain, received a group of police academy graduates from the 36th batch at his office in the Emiri Diwan this ...