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
SPRING-FUSE
The kid from the first start push-rod started the engine, and early test-in. The engine revs, causing the car faster and faster to run on the track. Here are the included machine-cut...
FIRST AIRCRAFT MODEL
These beautiful and flying planes are very simple. Even preschoolers can make them with the help of adults. To work, you will need thick paper (whatman paper), several dry and straight...
