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• Optical bench--the optical instrument is made of materials and is ,source aperture imaging equipment
• Optics equipment--study the imaging law of convex and concave lenses/determination of focal length,physical experimental platform
• Optical instruments--perfect product for school optical experiment removable, easy to assemble and install,light refraction equipment
• Source aperture imaging device--great lens, light, strong penetrating power, obvious experimental effect,optical bench
• Light refraction equipments--the product adopts materials and has a stable structure, which makes your research and more !,optical bench