Professional Hand Tools 40m Portable Unit Display Digital Laser Point Distance Meter with CE Certificate for Measuring Use
Product description
The first laser in the world was the ruby laser, which was first developed by American Hughes Aircraft Company scientist Mayman in 1960. The US military soon carried out research on military laser devices on this basis. In 1961, the first military laser rangefinder passed the demonstration test of the United States military, and the laser rangefinder soon entered the practical stage.
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