What are the precautions for homeroom laser pointer?
Use a laser pointer to make a high-powered magnifying glass at home to see the microbes in your dog's saliva. Laser pointer magnifying glass, saliva in the microbes can also see. The e tools you'll need are a sample of water, pond water, tap water, dog saliva (or whatever it is). Bath water will do...) A plastic syringe, several glasses, a laser pointer, 5MW is ok, but the stronger the power, the better the effect, pay attention to, do not let the laser pointer directly into anyone's eyes, use the syringe to draw some sample of water, pay attention to wash the tube between two pumping to prevent pollution.
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Use a laser pointer to make a high-powered magnifying glass at home to see the microbes in your dog's saliva. Laser pointer magnifying glass, saliva in the microbes can also see. The e tools you'll need are a sample of water, pond water, tap water, dog saliva (or whatever it is). Bath water will do...) A plastic syringe, several glasses, a laser pointer, 5MW is ok, but the stronger the power, the better the effect, pay attention to, do not let the laser pointer directly into anyone's eyes, use the syringe to draw some sample of water, pay attention to wash the tube between two pumping to prevent pollution.
2021-12-01 12:26:41
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