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
HOW TO AVOID FLOOD
Many families today live in multi-storey buildings and use of household washing machines. Everyone who connects this machine (for electrical switchboards and sanitary communications),...
AIRMOBILE PARAGLIDING
Construction of a cart for a paraglider was preceded by a simple passion for paragliding, which did not come immediately. Initially, I flew on airplanes (I have a pilot's license) and hang...