§ 571.108 Standard No. 108; Lamps, reflective devices, and associated equipment.（灯具，反射装置和辅助设备）S1. Scope. This standard specifies requirements for original and replacement lamps, reflective devices, an
1“Light emitting surface”透光面R482.8"Light emitting surface" of a "lighting device", "light-signaling device" or aretro reflector means the surface as declared in the request for approval bythe manufact
mess的用法和搭配透镜设计mess的意思是“混乱；杂乱；脏乱” 。胰腺炎什么症状一、mess作名词，意为“混乱；杂乱；脏乱”。第29届奥运会1. She was very angry to e the mess he had made in the kitchen. 她看到他在厨房弄出的一团糟很生气。2. What a mess! Can't you be more tidy?上海旅游攻略
一种LED射灯透镜的设计IntroductionLED lamps have become an esntial part of modern lighting systems, with their energy-saving and long-lasting properties. However, in order to achieve their full potential, LED
