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
SCREW PLUS BAR…
...make a surface gauge. In the block of hard wood drilled a hole in which is screwed into the screw. Use a screwdriver to set the distance required for the application of risks. ...
COTTAGE-AMPHIBIAN
We have already talked about a jeep-climber, which could become a new kind of mountain transport (see "M-To" No. 12 of 1974). But machine-controlled trucks will be able to find...
