User Manual >, RECOMMENDED REASON, LT-40W-F23 is a high performance fixed focus laser module for beginners. 5W optical power output, it adopts
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LASER TREE 20W Optical Power Laser Module for Laser Engraver Cutter, 80W Laser Engraver Module with Air Assistance, High Accuracy Quad-Compression Spot Laser Head, Engraving 340+ Colors On Metal Steel - Yahoo
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