dust
Dust (dust) is a state in which lint, hair, ticks, ticks of feces, spores of mold, dandruff and the like coming out of the fiber are floating in the air or gathering in the corners of the floor or the like. Objects that make up visible dust have many colors, but because of subtractive color mixing and the presence of gaps between the objects and objects that make up the dust, dust is gray in human eyes Looks like. Usually, remove it with a vacuum cleaner or a broom. If you are at a high place, use the hatch, then collect the dust that you dropped on the floor and throw away. If you are floating in the air, remove it with an air purifier. If it is inside the computer, use a dust spray to blow off. Also, since plastic products call for dust by their static electricity, it is necessary to clean them regularly. Even "dust" may be called "soot" such as soot payment. Recently, it has become possible to recycle to concrete. ...