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In any type of ultra precise and fine line indication at longer distance than formal hand reaching, factory workers and engineers would prefer to operate a highly bright beam emitted tool of Berlinlasers 532nm green laser line generator. It generates highly fine and straight green line within 0.5 meter to 6 meters length from a qualified glass coated lens. Cooperated with adjustable focus optic lens, either pointing at close or long distance, this compact structure made green laser enables no mistake and no barrier line alignment for laser cutting, saw mill, textile industry, military targeting and high tech fields etc.
https://www.berlinlasers.com/532nm-glass-lens-green-laser-line-generator
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