In homes today, it is used quite a lot of galvanic power sources (batteries). Even the most “long-playing”-of them at the end of life just thrown away, though their metal body remains as entire as at first. If you take it apart, it would make a great ring to strengthen the wooden handles of files, needle files, awls, cutters for turning operations on a tree.
A. PISKUNOV, S. L o V C s. Moscow region
Recommend to read
Give the trunk aerodynamics too!
To begin with, I suggest that car‑enthusiast readers run a small experiment. Next time you drive out of town, stop on a high‑speed stretch of highway and watch the passenger cars rushing...
“VIRTULA” FOR ALL
Designing a new racing control line aeromodel, we opted not on some extravagant options, but the proven classic design, well established and fully proven to date. The base design was...
