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
THE RESPONSE FROM CHAMBERLAIN
The first years after the conclusion of the London naval agreement of 1930, it caused a massive shift to the construction of light cruisers with 6-inch guns, were relatively quiet. The...
CAPTURED TANKS IN THE RED ARMY
Use in the red Army captured German tanks (as, indeed, in the Wehrmacht Soviet) began with the first days of the great Patriotic war. So, on June 27 1941, at the beginning of tank...
