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There is a PVB film between 2 tempered glass lenses which could enhance the glass intensity sharply. Once the glass lens broke into pieces, the PVB film may agglutinate the culets together to ensure safety and the glass lens still can be used within a certain time.
There is a PVB film between 2 tempered glass lenses which could enhance the glass intensity sharply. Once the glass lens broke into pieces, the PVB film may agglutinate the culets together to ensure safety and the glass lens still can be used within a certain time.
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