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
DRILL PIPE…
I want to share with the readers one very simple method of drilling holes in the glass, which I was taught many years ago Professor N. A. Artemyev. The method is attractive because it...
THREAD-LOCK
the Stopper of a thermos under prolonged exposure to high temperatures over time, weakens and poorly kept in the neck of the vessel. A reliable lock can provide a strong thread or thin...
