割让
发表于 2025-3-30 11:38:27
Laser Safety,All energy is dangerous, even gaining potential energy walking up stairs is dangerous! The laser is no exception, but it poses an unfamiliar hazard in the form of an optical beam. Fortunately, to date, the accident record for lasers is very good, but there have been accidents. The risk is reduced if the danger is perceived.
温顺
发表于 2025-3-30 14:20:06
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