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There are many types of safety glasses, including dust-proof glasses, impact-proof glasses, chemical-resistant glasses, and anti-light radiation glasses

Put two objects with different cold and hot together and touch each other. After a period of time, the temperature of the two objects will reach the same degree of cold and hot.

Hold the upper end of the thermometer in your hand. The glass bulb of the thermometer is completely immersed in the liquid being measured.

Gas thermometer: Hydrogen or helium is mostly used as the temperature measuring substance. Because the liquefaction temperature of hydrogen and helium is very low

If you buy a glass thermometer, then you must learn to use it correctly. Because the use of glass thermometers requires us to be very careful.

All objects with a temperature above absolute zero are constantly emitting infrared radiation energy into the surrounding space.

Infrared diagnostic technology makes reliable predictions of early faults and insulation performance of electrical equipment, and improves the preventive test

According to the service life, it can be divided into disposable protective clothing and reusable protective clothing.

Flame retardant performance: The protective clothing with flame retardant performance should meet the requirements of Grade B2 in GB17591-1998.

Biosafety laboratories generally do not need to consider high, low temperature, electromagnetic radiation and other hazards