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凹面反射镜：-教育设备"物理学设备"凹面反射镜 凹面反射镜–物理学光学设备 一个凹面反射镜，或聚光反射镜，有一的反射表面那个隆起的向内(距离射光)。 凹面镜反射光线内的一个焦点。 它们被用于聚焦光线。 反射镜是非常切片，光真正的(喷漆在后面)有一个美丽的戒指在其外表面)。 直径的焦距 50mm10

360 Promises---Best quality,best service,best price!---Long businessQuality As the good quality of our products, it's almost less than 1% defective r

1.product name:large high power 2.Lamp socket:s25-1156/1157 T20 7440/7443/3156/3157 3.Available Voltage:12VDC 4.Color:red,yello,bule,green,white are

PW-008 Lenses : 35mm Height: 10.4mm LEDBeamSeoul P3 10°Seoul P49.0°CREE XP-C5.4°CREE XR-C6.0°CREE XR-E6.9°OSRAM W5AM6.9°OSRAM

led lens LEDtronics built its latest high-intensity discrete LED with a concave lens, so the 5-mm-wide T1-¾ device delivers light that is ev

Circular Polarized 3D Glasses: 1)Product profile: this circular polarized 3d glasses used for 3d movie and 3d TV etc. 2)Product structure:ABS easy fr

Hi-SHOCK DLP-link 3D glasses adopt authorized DLP-link communication technology, the glasses gain DLP-Link sync pulse from the projected picture to i

OEM High Quality 3D TV Glasses Circular Polarized 3D Glasses : 1)Product profile: this circular polarized 3d glasses used for 3d movie and 3d TV etc.