In winter, a suit for window boxes”refrigerators” to store perishable products. It is not very convenient for many reasons: it is necessary to open the Windows; the produce into the machine. However, this same box can be set just on the windowsill, and to it through the frame to drill a few holes with a diameter of about 12 mm by inserting them into tubes so the cold air does not get between the frames, and went straight into the bin. Movable plate, Overlapping the hole, allow to regulate the flow of cold air. A. VINOGRADOV, Mogilev
Recommend to read
BURNER WITHOUT FIRE…
By analogy with existing devices for welding and brazing working "with the light", this device is also called a burner. However, it acts on the mating parts do not flame, and hot air...
THREAD IN A THIN SHEET
Usually designers avoid threaded joints if at the conventional "nut" less than two to three threads. Method shown in figure, allows you to make a threaded connection more reliable....
