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Material: CR-39 PPG
Refraction index Nd=1.499
Abbe Value:58
Specific gravity:1.32
High scratch resistance
New de...
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| Jlin West Road, Danyang, China | Contact Now |
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*****:Refractive index is 1.59 PC reading lens is 30%thinner than general reading lens.
2.light:37% lighter than AC ...
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| Xinglin, XIAMEN, China | Contact Now |
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