To eliminate the need to carry a ruler or tape measure, apply a linear division on the comb, which is always in my pocket.
N. TURULIN, Taganrog
Recommend to read
OBJECTIVE EXAMINER
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...
Cup HOLDER? IT IS NOT NEEDED!
His appearance holder, obviously, was due to the fact that it was not possible to attach the handle to the glass. Modern chemistry allows you to do this even at home. Take the glue BF-2...