
Plastic body ball point pen is often broken, especially at the tip, near the writing unit. Operational offer a way out: to tighten tight the rod in a paper tube, taped the edge of the strand. This “ball” will serve to securely purchase the new.
N. ALIKIN, St. P etersburg
Recommend to read
DRYING WATER…
In this issue we introduce young innovators, participants of operation "the Introduction" with an unusual method of drying developed in Nikolaev. At our request about it, say the authors...
THE FUSE IN THE AC CIRCUIT
Circuit of electronic fuse alternating current, represented in the figure, protects the circuit in which the output is regulated by the triac (or just the triac operates in the mode...