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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MAGIC IS “ACROBAT”
The principle of the toy is clear from the figure. Figure "acrobat" with a height of about 25 mm of foam is spherical in the base of the lead. Making the jump, a figure stands on the...
What kind of stove is this without a chimney?
Indeed: how to remove combustion products from a stove without a good chimney? Without it, there will be no necessary draft either.
There are three main types of chimneys — wall-mounted...