This simple device facilitates the use of any tube, helping to squeeze it evenly and gently. It consists of a base in a hole which is inserted the tube, and turning a key with slit for exciting a planar end of the tube. The base and key are made of wooden bars of appropriate dimensions. Their interaction is clear from the figure.
Recommend to read
BATTLESHIP “ADMIRAL USHAKOV”
COASTAL DEFENSE BATTLESHIP "ADMIRAL USHAKOV". Scale model 1:200. One of the most famous ships of the Russo-Japanese war, the battleship "Admiral Ushakov" was laid on 22 October 1892 at...
CHICKEN “THE ADDING MACHINE”
Lives in the people the joke about the old woman who, driving in the evening your chickens, consider them a kind of binary system pair, pair, pair, pair. A Fox dragged a one — lady...