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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Pockets home worker during work, usually "clogged" with all sorts of "needed stuff". To increase their volume and provide easy access to help special apron with pockets made from old jeans.
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I propose an extremely simple structure of the electronic musical instrument. Its structure is clear from the drawing and the concept. The musical range of 2-3 octaves. The...
