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 SEAT ON THE TRUNK
If the lattice bike rack seems not very convenient, to make him removable seat made from thick cut plywood or particleboard. It is mounted on the bottom decks.