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ТЕМА: Class 4 laser pen safety of now

Class 4 laser pen safety of now 14 авг 2017 13:10 #1

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Combustion laser products are classified into the following grades: Class 1, Class 1M, Class 2, Class 2M 3R, 3B,class 4 laser pen, Category and Classes are marked with the required laser. "Yesterday, the reporter contacted a friend, M. Zhang, he said, often from here, under the recent road on the shining green road often found in the road, The "It's easy to twist your eyes and it's easy to get out of trouble."
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