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
COMBAT BECOMES PEACEFUL
Dedicated to the memory of General designer Mikhail Kuzmich Yangelya. In issue No. 7 of 2000 published an article "the workhorse of the launch sites" dedicated booster light class —...
Brake light controller
A vehicle’s electrical system can be supplemented with a device whose schematic and wiring are within reach of even a beginner. This device is a controller whose value is clear: its status...
