
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
THERMOELASTIC FOAM
In our self-similar groups the foam — some of the most popular materials. One day we read in the "M-K" (No. 9, 1977) about the different ways of processing foam. We liked most of the...
LIGHT AT LOW SPEED
Velodyne, works great at high speed, but worth a go on a broken road — the spotlight begins to fade. The reason is lack of frequency of rotation of the rotor of the generator at low...