Which heroes know PVC pipe 6 points and 4 points which big?
In addition, most of the rooms are now taking the dark line, that is, in the wall trench wiring, there will be no serious consequences, if you are afraid of cracks, scraping ingredients to be proportional to the OK, and then ask questions I'm oh
1 square line (copper wire) can withstand about 5A current. 2.5 square lines bear the current: 2.5 * 5 = 12.5AP = 1.732 * 380 * 12.5 = 8.227KW and so on.
People breathe a small amount of ozone without much impact! But breathing more breathing, may be dizzy, vomiting, fainted! Heavy .... If you install the ozone lamp, sterilization, more than half an hour to open the door, smell the smell of the air, feel it! If you can, go in! There are two types of UV germicidal lamps: the main line of 254nm (no ozone) and the main line of 185nm (with ozone). It is best not to use ozone sterilization lamp! There are several ordinary schools with ozone lamp!
