To control the horizontal position of the parts and elements of building structures typically use a bubble level. To as, for example, to check the position of the roof ridge or panels, the spacecraft that are set to make the level impossible! The easiest level for these cases — conventional PVC tube with a diameter of 6 mm, better transparent. Fill it with water, directing the open ends up. According to the principle of communicating vessels, the level in both the knees are set at the same height, and hence the line connecting them will always be strictly horizontal.
I. KONOPLENKO, V. Lepetykha village, Kherson region.
Recommend to read
PIONEER AIR TRAVELS
In the first decade of the nineteenth century, the airplane had only just learned to fly. And the brave pilots of those years sought to master it so that you can explore the air travel....
HOT GLASS CUTTER
This unusual method of forming holes in the glass not only allows you to do without a glass cutter, but provides the ability to shaped cut-outs and, thus, the details of sheet of...
