粉尘（Dust）是指悬浮在空气中的固体微粒。习惯上对粉尘有许多名称，如

Dust refers to solid particles suspended in the air. It is customary to have many names for dust, such as dust, dust, smoke, mine dust, sand dust, powder, etc., these terms have no obvious boundaries. The International Organization for Standardization stipulates that solid suspended solids with a particle size of less than 75 μm are defined as dust. The existence of dust in the atmosphere is one of the main reasons for maintaining the temperature of the earth. Too much or too little dust in the atmosphere will have a catastrophic impact on the environment. But in life and work, productive dust is the natural enemy of human health and the main cause of various diseases.

Dust is a solid particle suspended in the air. Customary dust has many names, such as dust, dust, soot, mineral dust, sand dust, powder, etc. , these nouns have no obvious boundaries. The International Organization for Standardization (ISO) stipulates that solid suspensions with a particle size of less than 75 m are defined as dust. The presence of dust in the atmosphere is one of the main reasons for keeping the Earth's temperature, and too much or too little dust in the atmosphere can have a disastrous effect on the environment. However, in life and work, productive dust is the natural enemy of human health and is the main cause of many diseases.

Dust refers to the solid particles suspended in the air. Traditionally, there are many names for dust, such as dust, dust, soot, mineral dust, sand dust, powder, etc., which have no obvious boundary. According to the international organization for standardization, the solid suspension with particle size less than 75 μ m is defined as dust. The existence of dust in the atmosphere is one of the main reasons to keep the earth temperature. Too much or too little dust in the atmosphere will have a disastrous impact on the environment. But in life and work, productive dust is the natural enemy of human health, and is the main cause of many diseases.<br>