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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In the sixth issue of our magazine in 1974 we told about the device "Pulse" for the control of knowledge of students. Practice operating the machine created by the participants NTTM...
TRACKED MOTORCYCLE.
The design — motorcycle, half-track course with the steering front wheel with a tire of low pressure and driven by caterpillar designed to be driven on the road, mainly in the summer and...
