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 ON THE CONTROL
When developing propeller systems snowmobiles, trikes, aircraft and model aircraft designer is required to know the exact values of some parameters. And most importantly — the frequency...
MINI ONE
Nostalgic attempts to revive the once famous machines now become ubiquitous. Not spared this trend and famous company BMW, which at the Frankfurt motor show 2001 presented two car-twin —...
