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.
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The apparatus which I have named "aquaplane", designed for active swimming on the back even for non-swimmers, with stops to rest as on a sun lounger, directly on the water surface. It...
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If you have a SLR camera and adapter rings, make a photocopy knizhnoi articles, magazine pages, or other reproductions not accounting for labor. However, the camera "Zenit-GP" with lens...
