Metal soda cans and many canned goods now opened thanks to the special loop-shaped handle on the lid. And if the capacity is usually just thrown away, then the loop is easy to find useful for example, for the suspension frames, and small shelves.
Recommend to read
OIL FOR TWO-STROKE ENGINE
My article on the so-called separate lubrication system for a two-stroke engine was published in "Modelist-Konstruktor" No. 7, 1991. However, I still receive letters from readers...
ARCH TO ARCH – GREENHOUSE READY
The arched structure, under all other equal conditions, will always be stronger, more reliable, and cheaper than structures of other types—especially when the arch itself consists of rods...
