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
THREE, TWO, ONE-BLASTOFF!
...Pressed — and rocketmodel rushes into the sky. It worked Elektrostal — nichrome spiral, covered with inflammable matter, heated by an electric current, and the fuse ignited the powder...
WITH THE NAME SPANISH EXPLORERS
In the dark night of 18 to 19 September 1895 cruiser "Sanchez-Barkataki" out to sea. Yesterday, during a secret meeting, his commander captain 2nd rank ibáñez, Francisco Varela was...
