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
…YOU TOUCH THE LEVER — THE PART WILL CLAMP
The simplest collet was developed by the students in the CPC Leninsky district of the city of Alma-ATA. It can be used quickly and reliably to clamp cylindrical parts, shafts, axles,...
CRUISERS BECOME “PROTECTED”
In the decades after the civil war ghosts lucky raiders — armed ships of the southerners was a constant headache to the lords of the British Admiralty. In the event of war with such...
