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
ALL FOR BOOKS
Many of our readers may find useful and is available for self-production of the offered design, making rational and convenient to place and books "daily demand" — those that have to go...
WEAPONS AIR FIGHTERS
The followers of Cordoba modeling we offer today a selection of two closely-related within the meaning of materials. In the first of them tells of a very successful training model, which...
