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20pcs A4 Laser Testing Paper Test Focus Paper 8.3 x 11.2 Dimming Paper For Laser Marking Laser Welding Laser Cutting Machine - AliExpress

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20pcs A4 Laser Testing Paper Test Focus Paper Dimming Paper For Laser Marking Laser Welding Laser Cutting Machine $12.60

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20pcs A4 Laser Testing Paper Test Focus Paper 8.3 x 11.2 Dimming Paper For Laser Marking Laser Welding Laser Cutting Machine - AliExpress

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Size: 210mm x 285mm(8.3 x 11.2); Quantity: 20pcs / pack Laser welding machine dimming path, laser hit on this paper can see the circular spot,

20pcs Laser Testing Paper A4 Test Focus Paper Laser Dimming Paper for Laser Marking Laser Welding Laser Cutting Machine

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