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
SPOON…BOTTLE
Any application not find the large plastic bottles of mineral water and other beverages. I want to offer another option — to cut out such a Shoe spoon helps to wear tight shoes. S....
THE CROP IN THE DRUM
So it is from time immemorial: the harvest of potatoes and before putting it in winter storage, and shortly before spring planting is sort — separated small tubers, which are fed to...
