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
YOUR BEST SCREW
Unfortunately, experience manufacturing propellers for the Amateur designs with rare exceptions not worth repeating. And perhaps the main cause of failures in the inconsistency of the...
AND THE STOVE IS NOT LIT
With the onset of heat when the furnace in country houses no longer burn in their pipes often, birds build nests. In the fall and the owners wonder why the furnace began to smoke. This...
