... co2 laser tubes:high power, good beam spot,competitive price, which are applied to laser engraving, laser cutting.etc. Beijing EFR Laser ... the pricipal "Quality First,Credit First".1.stable laser mode spot. 2. High power3. Long ... cutting, laser mould processing, laser cutting machine, laser marking machine, leather processing, decoration and laser medical treatment machine and ... 7022 co2 laser tube