In the holes drilled in a wooden tube in the concrete wall, there is always a lot of sand and dust. To remove them will help plastic or metal tube by simply inserting it into the hole and how to blow into it (but mind your eyes!).
S. DOROFEEV, p. vokhtoga, Vologda region.
Recommend to read
An all-purpose vehicle for a farmer
I built the self-propelled chassis called “Bychok” (Little Bull) more than ten years ago. Over this substantial period of use the machine has proved unpretentious, reliable and capable....
UNKNOWN “CYCLONE”
The carrier rocket "Cyclone-3". Early 60-ies of the last century was marked not only by competition in space between the USA and the USSR, but a nuclear arms race. The first examples of...
